Yurii G. PASHKEVICH

Head of the Department of dynamic properties of complex systems,

Doctor of Sciences, Professor of Solid State Physics

Affiliation:

 

Donetsk Institute for Physics  & Engineering named after  O.O. Galkin (Donetsk PhysTech)

National Academy of Sciences of Ukraine

46, Nauki ave.

Kyiv, 03680 UKRAINE

E-mail:yu.pashkevich@gmail.com

Phone: +38 (044) 5240480

Scientific degrees and titles:

 2002 – Title: “Professor of Solid State Physics”,  Awarded by Ministry of Education and Science of Ukraine

1996   Doctor of Sciences Degree in Solid State Physics, B. I. Verkin Institute for Low Temperature Physics NAS of Ukraine, Kharkov, Ukraine Thesis: Spin dynamics of many-sub-lattice antiferromagnets

1984  Ph. D. in Solid State Physics, (Candidate of Sciences)  O. O. Galkin Donetsk Institute for Physics and Engineering NASU Thesis: Elementary excitations in rhombic many sub-lattice  antiferromagnets

 1972  M. Sc. Degree in Physics, Donetsk State University

Research areas: Dynamic Properties of the Magnetic Systems

Employment: Donetsk Institute for Physics  & Engineering NAS of Ukraine

Current position: Head of the Department of Dynamic Properties of Complex Systems, Professor of Solid State Physics

Teaching Experience

2015 – 2016 Professor at the sub-faculty General Physics, Department of Physics, Kharkov National University. Teaching course: “Magnetic phase transitions”

1999 – 2014 Professor at the sub-faculty Biophysics, Department of Biology, Donetsk National University. Teaching courses: “Introduction to Biophysics” and “Physical Methods in Biology”.

Supervisor of the six PhD theses which were successfully defended and eleven M. Sc. degree of diploma students. Scientific advisor of three Doctor of Sciences theses.

Special Awards:

2004 State Prize of Ukraine in Science and Technology for the series of works (performed with co-authors) “New optic and magnetooptic phenomena in antiferromagnets”.

International Research Projects and Grants:

2010     International Short Visit fellowship grant from Swiss National Science Foundation (IZK0Z2-134161) for two months research visit to the Laboratory for muon spin spectroscopy at the Paul Scherrer Institute in Villigen (collaboration with Dr. Hubertus Luetkens)

2006 – 2008  co-leader in the German Research Foundation project DFG-SP1137: im DFG-Schwerpunkt “Molecular Magnetism”, Title: Lattice dynamics contribution to the magnetic properties of molecular magnets: Raman and ultrasonic studies (co-leader Prof. Dr. Peter Lemmens)

 2002 – 2004  team leader in EC INTAS grant № 01-0278 “Charge/Orbital/Spin Ordering on the Verge of Co3+ Spin State Transition in the Giant Magnetoresistive Cobaltites”

 2001 – 2003   NATO Collaborative Linkage Grant PST.CLG.977766 “Optical and Magnetic Properties of Compounds that Exhibit Complex Charge Ordering

1998 – 2000  team leader in EC INTAS grant № 97-1371 “Electron lattice interaction in high-temperature superconductors of the BaBiO3 family”

1998  The International Science Foundation Grant for scientists and teachers No.QSU082142

1997 – 1999  team leader in EC INTAS grant  № 96-0410 “Influence of Phase Separation of Spins and Holes on the Phonon and Magnon Spectra in HTSC and Parent Compounds”

1996 – 1999     co-investigator in grant of U.S. Civilian Research and Development Foundation CRDF № BP1-111 “Investigation of the Vortex Structure, Spin and Lattice Dynamics of Single Crystals”

 1995  The International Science Foundation Grant No.U2U200

1994  The International Science Foundation Grant No.U2U000

1993  Soros Foundation Research Grant

Publications: Over 140 publications in refereed journals.

Monograph:
K. V. Lamonova, S. M. Orel, Yu. G. Pashkevich
Modified Crystal Field Theory and its Applications
Kyiv: Akademperiodyka, 2019, – 226 pages
Project: Ukrainian scientific book in a foreign language Publication Language: English
ISBN: 978-966-360-377-3; Doi: https://doi.org/10.15407/akademperiodyka.377.224

A new original approach to the study of coordination complexes with paramagnetic ions, the modified crystal field theory (MCFT), is represented in the monograph. The approach is based on a new parametrization of the problem by the effective nuclear charge of a paramagnetic ion. Implicit accounting for ligand electrons significantly enhances the predictive capability of the proposed method. The book gives some examples of the MCFT applications for the interpretation of various experiments. To describe the spin state variations of paramagnetic ions under different coordination complex distortions the spin state diagrams are suggested for the first time.

Recent Publications (2014-2019)

Magnetic and structural correlations in the warwickite Mn2OBO3
V. Gnezdilov, Yu. Pashkevich, V. Kurnosov, O.V. Zhuravlev, D. Wulferding,
P. Lemmens, N.V. Kazak, Yu.V. Knyazev, and S.G. Ovchinnikov
Low Temperature Physics  45, No. 9, pp. 1046–1052 (2019) (AIP version)

Impact of temperature dependent octahedra distortions on magnetic properties of Co-containing double layered hydroxides
R.Yu. Babkin, Yu. G. Pashkevich, A. V. Fedorchenko, E. L. Fertman, V. A. Desnenko,
A. I. Prokhvatilov, N. N. Galtsov, D. E. L. Vieira, A. N. Salak
Journal of Magnetism and Magnetic Materials, 473, pp. 501-504 (2019)

Flat-band spin dynamics and phonon anomalies of the saw-tooth spin-chain system Fe2O(SeO3)2
V. P. Gnezdilov, Yu. G. Pashkevich, V. S. Kurnosov, O. V. Zhuravlev, D. Wulferding,
P. Lemmens, D. Menzel, E. S. Kozlyakova, A. Yu. Akhrorov, E. S. Kuznetsova, P. S. Berdonosov, V. A. Dolgikh, O. S. Volkova, and A. N. Vasiliev
Phys. Rev. B 99, 064413 (2019)

Structure and Optical Properties of CNx–Ni and CNx–EuCl3 Core/Shell Nanostructured Films
A. Prudnikov, Yu. Pashkevich, K. Lamonova, P. Maksimchuk, O. Viagin, Yu. Malyukin and M. Pas’ko
in book Advances in Thin Films, Nanostructured Materials, and Coatings, Lecture Notes in Mechanical Engineering, A. D. Pogrebnjak and V. Novosad (eds.), pp.197-206 Springer Nature Singapore Pte Ltd. 2019 https://doi.org/10.1007/978-981-13-6133-3_20

Giant magnetocapacitance in cerium sesquioxide
T. Kolodiazhnyi, H. Sakurai, M. Avdeev, T. Charoonsuk, K. V. Lamonova,
Yu. G. Pashkevich, and B. J. Kennedy
Phys. Rev. B 98, 054423 (2018)

Local magnetic anisotropy of rare-earth elements in the iron-containing oxypnictides RFeAsO (R=Ce, Nd, Sm)
O. V. Gornostaeva, K. V. Lamonova, S. M. Orel, and Yu. G. Pashkevich
Low Temperature Physics 44, 50 (2018) (AIP version)

Phonon excitations in the quasi-one-dimensional Haldane phase of SrNi2V2O8
V. Kurnosov, V. Gnezdilov, P. Lemmens, Yu. Pashkevich, A.K. Bera, A.T.M.N. Islam, and B.Lake
Low Temperature Physics 43, 1405 (2017) (AIP version)

Effective nuclear charge approximation for free rare-earth ions
O. V. Gornostaeva, R. Y. Babkin, K. V. Lamonova, S. M. Orel & Yu. G. Pashkevich
Spectroscopy Letters, 50, no. 9, 482-488 (2017)

Lattice and magnetic instabilities in Cu3Bi(SeO3)2O2X (X=Br,Cl)
V. Gnezdilov, Yu. Pashkevich, P. Lemmens, V. Kurnosov, P. Berdonosov, V. Dolgikh, E. Kuznetsova, V. Pryadun, K. Zakharov, and A. Vasiliev
Phys. Rev. B 96, 115144 (2017)

Magnetic phenomena in Co-containing layered double hydroxides
D.E.L. Vieira, A. N. Salak, A.V. Fedorchenko, Yu.G. Pashkevich, E.L. Fertman, V.A.Desnenko, R.Yu. Babkin, E. Čižmár, A. Feher, A.B. Lopes, and M.G.S. Ferreira
Low Temperature Physics 43, 977 (2017) (AIP version) https://doi.org/10.1063/1.5001299

Formation mechanism of luminescence spectra of carbon nitride films doped by europium chloride CNx: EuCl3
R. Yu. Babkin, K. V. Lamonova, S. M. Orel, A. M. Prudnikov, Yu. G. Pashkevich, O. V. Gornostaeva, O. G. Viagin, P. O. Maksimchuk, Yu. V. Malyukin
Journal of Luminescence 186, pp. 247–254 (2017)

Phase separation in iron chalcogenide superconductor Rb0.8+xFe1.6+ySe2 as seen by Raman light scattering and band structure calculations
Yu. Pashkevich, V. Gnezdilov, P. Lemmens, T. Shevtsova, A. Gusev, K. Lamonova, D. Wulferding, S. Gnatchenko, E. Pomjakushina, and K. Conder
Low Temperature Physics, 42, pp. 491–504 (2016) (AIP version)

Encapsulating “armchair” carbon nanotubes with “zigzag” chains of Fe atoms
V. G. Boutko, A. A. Gusev, T. N. Shevtsova, Yu. G. Pashkevich
Low Temperature Physics 42, 421-425 (2016) (AIP version)

Muon spin rotation study of the magnetic structure in the tetragonal antiferromagnetic state of weakly underdoped Ba1−xKxFe2As2
B. P. P. Mallett, Yu. G. Pashkevich, A. Gusev, Th. Wolf and C. Bernhard
Euro Physical Letters, 111 57001 6 pages (2015)

Specific features of the temperature behavior of the ESR spectra of Fe-doped mercury selenide
K. Lamonova, B. Bekirov, I. Ivanchenko, N. Popenko, E. Zhitlukhina, V. Burkhovetskii,
S. Orel, and Yu. Pashkevich
Low Temperature Physics 40, No7 655-661 (2014) (AIP version)

Structural, electronic and magnetic properties of chiral nanotubes filled with a linear chain of iron
V. G. Boutko, A. A. Gusev, T. N. Shevtsova and Yu. G. Pashkevich
Low Temperature Physics 40, pp.542-546 (2014) (AIP version)

An investigation of the adiabatic potential surface in single crystals with copper ions
V. A. Shapovalov, E. S. Zhitlukhina, K. V. Lamonova, S. M. Orel, S. N. Barilo and Yu. G. Pashkevich
Low Temperature Physics 40, pp. 462-468 (2014) (AIP version)

Temperature Dependence of the Spin State of a Co3+ Ion in RCoO3 (R = La, Gd) Cobaltites
R. Yu. Babkin, K. V. Lamonova, S. M. Orel, S. G. Ovchinnikov, and Yu. G. Pashkevich
JETP Letters, 99,  pp. 476–480 (2014)

Publications (2006-2013)

Structural properties and high-temperature spin and electronic transitions in GdCoO3: Experiment and theory.
Yu. S. Orlov, L. A. Solovyov, V. A. Dudnikov, A. S. Fedorov, A. A. Kuzubov, N. V. Kazak, V. N. Voronov, S. N. Vereshchagin, N. N. Shishkina, N. S. Perov, K. V. Lamonova, R. Yu Babkin, Yu. G. Pashkevich, A. G. Anshits, S. G. Ovchinnikov.
Physical Review B, 88, 235105, 14 pages (2013)

Pressure enhanced ferromagnetism and suppressed exchange bias in La0.9Ba0.1CoO3 cobaltite.
I. Fita, R. Puzniak, A. Wisniewski, V. Markovich, I.O. Troyanchuk, Yu.G. Pashkevich.
Journal of Applied Physics, 114,  153910, 6 pages (2013)

Lattice and orbital fluctuations in TiPO4
Dirk Wulferding,  Angela Möller,  Kwang-Yong Choi,  Yurii G. Pashkevich, Roman Yu. Babkin, Karina V. Lamonova, Peter Lemmens, Joseph M. Law, Reinhard K. Kremer, and Robert Glaum     Physical Review B vol. 88, N20, 205136, 10 pages (2013)

Magnetic properties of Ce3+ ion in iron-containing oxypnictide CeFeAsO
O. V. Gornostaeva, K. V. Lamonova, S. M. Orel, and Yu. G. Pashkevich
Low Temperature Physics 39, 343-350 (2013) (AIP version)

Interplay between lattice and spin states degree of freedom in the FeSe superconductor: Dynamic spin state instabilities.
Vladimir Gnezdilov, Yurii G. Pashkevich, Peter Lemmens, Dirk Wulferding, Tatiana Shevtsova, Alexander Gusev, Dmitry Chareev, and Alexander Vasiliev
Physical Review B Vol. 87, N14, 144508, 11 pages (2013)

The structural, electronic and magnetic properties of iron nanowires with different diameters.
V. G. Boutko, A. A. Gusev, T. N. Shevtsova, and Yu. G. Pashkevich
Low Temp. Phys. 38, 1129 (2012) (AIP version)

The fluctuations of the spin state of 3d-ions near the “triple point”
E. S. Zhitlukhina, K. V. Lamonova, S. M. Orel, and Yu. G. Pashkevich
Low Temp. Phys. 38, 930 (2012) (AIP version)

Spin state of iron—the control parameter of iron-containing HTSC: Dependence of ground state energy, phonon energies and atom positions on the spin state of iron ion in FeTe
Yu. G. Pashkevich, T. N. Shevtsova, A. A. Gusev, V.P. Gnezdilov and P.Lemmens
Low Temp. Phys. 38, 900 (2012) (AIP version)

Dynamical lattice instability versus spin liquid state in a frustrated spin chain system
V. Gnezdilov, P. Lemmens, Yu. G. Pashkevich, D. Wulferding, I. V. Morozov, O. S. Volkova, and A. Vasiliev
Physical Review B Vol. 85, N21,214405, 6 pages (2012)

Low-dimensional magnetism of spin-. chain systems α- and β-TeVO4: a comparative study
V. Gnezdilov, P. Lemmens, D. Wulferding, Yu. Pashkevich, K. Lamonova, K.-Y. Choi, O. Afanasiev, S. Gnatchenko, and H. Berger
Low Temperature Physics, 38, 559, 11 pages (2012) (AIP version)

Determination of the Effective Nuclear Charge from EPR  Data Using a Modified Crystal Field Theory
R. Yu. Babkin, K. V. Lamonova, S. M. Orel, Yu. G. Pashkevich, and V. F. Meshcheryakov
Optics and Spectroscopy, Vol. 112, No. 3, pp. 438–442 (2012)

 Coexistence of Superconductivity and Magnetism in FeSe1-x under Pressure
M. Bendele, A. Ichsanow, Yu. Pashkevich, L. Keller, Th. Strässle, A. Gusev, E. Pomjakushina, K. Conder, R. Khasanov, H. Keller
Physical Review B Vol. 85, N6, 064517, 11 pages (2012)

Magnetic Dynamics and Spin Freezing in the Ferromagnetic Phase of Ba-Doped Perovskite Cobaltites
M. Stingaciu, H. Luetkens, Y.G. Pashkevich, E. Pomjakushina, K. Conder, H.-H. Klauss arXiv:1111.5232.

Structural and electronic properties of single layer nanotubes with particular replacement of carbon to nitrogen
V. G. But’ko, A. A. Gusev, T. N. Shevtsova, and Yu. G. Pashkevich
Low Temp. Phys. 37, 1282 (in russian version) (2011)

Helical fluctuations in the Raman response of the topological insulator Bi2Se3  V. Gnezdilov, Yu. G. Pashkevich, H. Berger, E. Pomjakushina, K. Conder, P. Lemmens Physical Review B, – Vol. 84, No. 19. – 195118, 5 pages (2011)

Intermediate Spin State of a 3d Ion in the Octahedral Environment and Generalization of the Tanabe-Sugano Diagrams
К. V. Lamonova, E. S. Zhitlukhina, R.Yu. Babkin, S. M. Orel, S. G. Ovchinnikov, Yu. G. Pashkevich
The Journal of Physical Chemistry A 115, 13596-13604, (2011)

Coupled spin-lattice fluctuations in a compound with orbital degrees of freedom: The Cr-based dimer system Sr3Cr2O8
Dirk Wulferding, Peter Lemmens, Kwang-Yong Choi, Vladimir Gnezdilov, Yurii G. Pashkevich, Joachim Deisenhofer, Diana Quintero-Castro, A. T. M. Nazmul Islam, and Bella Lake
Physical Review B, – Vol. 84, No. 6. – 064419, 7 pages (2011)

Phonon anomalies and possible local lattice distortions in giant magnetocapacitive CdCr2S4
V. Gnezdilov, P. Lemmens, Yu. G. Pashkevich, Ch. Payen, K. Y. Choi, J. Hemberger, A. Loidl, and V. Tsurkan.
Physical Review B – Vol. 84, No.4. – 045106, 6 pages (2011)

Anomalous optical phonons in FeTe chalcogenides: Spin state, magnetic order, and lattice anharmonicity
V. Gnezdilov, Yu. Pashkevich, P. Lemmens, A. Gusev, K. Lamonova, T. Shevtsova, I. Vitebskiy, O. Afanasiev, S. Gnatchenko, V. Tsurkan, J. Deisenhofer, and A. Loidl.
Physical Review B, – Vol. 83, No. 24. – 245127, 6 pages (2011)

Multi-minimum adiabatic potential in the single crystal normal spinel ZnAl2O4, doped by Cu2+ ions,
V. A. Shapovalov, E. S. Zhitlukhina, K.V. Lamonova, V.V. Shapovalov, M. Rafailovich , S. A. Schwarz , R. Jahoda , V. J. Reidy , S. M. Orel and Yu. G. Pashkevich
J. Phys.: Condens. Matter v. 22, 245504 (2010)

Magnetoelectricity in the ferrimagnetic Cu2OSeO3: symmetry analysis and Raman scattering study,
V. Gnezdilov, K.V. Lamonova, Yu.G. Pashkevich, P. Lemmens, H. Berger, F. Bussy, S.L.Gnatchenko
Low Temp. Phys. 36, 550 (2010)

Electronic structure of a (12, 0) carbon nanotube encapsulated with crystalline potassium,
V. G. But’ko, A. A. Gusev, T. N. Shevtsova, and Yu. G. Pashkevich
Low Temp. Phys. 35, 883 (2009)

Determination of the effective nuclear charge for free ions of transition metals from experimental spectra,
R. Yu. Babkin, K. V. Lamonova, S. M. Orel and Yu. G. Pashkevich
Optics and spectroscopy 107, № 1, p. 9 (2009)

Interplay of rare earth and iron magnetism in RFeAsO (R=La, Ce, Pr, and Sm): Muon-spin relaxation and symmetry analysis
H. Maeter, H. Luetkens, Yu. G. Pashkevich, A. Kwadrin, R. Khasanov, A. Amato, A. A. Gusev, K. V. Lamonova, D. A. Chervinskii, R. Klingeler, C. Hess, G. Behr, B. Buchner, and H.–H. Klauss Physical Review B 80, 094524 (19 pages) (2009)

Magnetic properties of the layered cobaltite NdBaCo2O5.50 ,
A. Jarry, H. Luetkens, Yu. G. Pashkevich, M. Stingaciu, E. Pomjakushina, K. Conder, P. Lemmens, H.-H. Klauss
Physica B: Condensed Matter 404, 765 (2009).

Magnetic and transport properties of Gd0.9A0.1CoO3−δ (A = Ba, Sr)
N. V. Kazak, N. B. Ivanova, C. R. Michel, S. G. Ovchinnikov, Yu. G. Pashkevich, A. D. Balaev, G. V. Bondarenko,
J. Magn. Magn. Mater. 321, 1266 (2009).

Changes of the electronic structure of a (8, 0) zigzag nanotube due to doping with potassium,
V. G. But’ko, A. A. Gusev, T. N. Shevtsova, and Yu. G. Pashkevich
Low Temp. Phys. 35, 137 (2009).

Double well potential in FeO as a result of spin density redistribution,
O.V.Gornostaeva, V.M.Shatalov, Yu.G.Pashkevich
JETP Letters 89, issue.4, p.171 (2009)

Spectroscopic evidence of spinel phase clustering in solid solutions Hg1-xCrxSe (0.03<x<0.1)
K. Lamonova, I. Ivanchenko, S. Orel, S. Paranchich, V. Tkach, E. Zhitlukhina, N. Popenko and Yu. Pashkevich
J. Phys.: Condens. Matter 21, 045603 (2009).

Spectrum-sensitive phonon wipeout due to a fluctuating spin state in a Fe2+ coordination polymer
V. Gnezdilov, P. Lemmens, P. Scheib, M. Ghosh, Yu. G. Pashkevich, H. Paulsen, V. Schünemann, J. A. Wolny, G. Agustí, and J. A. Real
Physical Review B 79, 045122 (2009).

Microscopic Evidence of Spin State Order and Spin State Phase Separation in Layered Cobaltites RBaCo2O5.5 with R = Y, Tb, Dy, and Ho,
H. Luetkens, M.Stingaciu, Yu. G. Pashkevich, K. Conder, E. Pomjakushina, A. A. Gusev, K.V.Lamonova, P. Lemmens, and H.-H. Klauss
Physical Review Letters 101, 017601 (2008).

Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system α-TeVO4 ,
V. Gnezdilov, P. Lemmens,A. A. Zvyagin, V. O. Cheranovskii, K. Lamonova, Yu. G. Pashkevich, R. K. Kremer, and H. Berger
Physical Review B 78, 184407 (2008).

Evidence for local lattice distortions in giant magnetocapacitive CdCr2S4
V. Gnezdilov, P. Lemmens, Yu. G. Pashkevich, P. Scheib, Ch. Payen, K. Y. Choi, J. Hemberger, A. Loidl, V. Tsurkan,
ArXiv:cond-mat/0702362

Oxygen isotope effect on the AFM–FM phase transition of the layered cobaltite HoBaCo2O5.47 ,
H. Luetkens, M. Stingaciu, Yu. G. Pashkevich, P. Lemmens, E. Pomjakushina, K. Conder, H.-H. Klauss J. Magn. Magn. Mater. 310, 1566–1568 (2007).

Anomalous electronic, phonon, and spin excitations in the chalcogenide spinel FeCr2S4 ,
K.-Y. Choi, P. Lemmens, P. Scheib, V. Gnezdilov, Yu. G. Pashkevich, J. Hemberger, A. Loidl and V. Tsurkan
J. Phys.: Condens. Matter. 19, 145260 (2007).

Spin state transformations of a 3d ion in the pyramidal environment and under lattice distortions,
E. Zhitlukhina, K. V. Lamonova, S.Orel, P. Lemmens, Yu. G. Pashkevich
J. Phys.: Condens. Matter. 19, 156216 (2007).

Structural phase transition in two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2
V. Gnezdilov, V. Bedarev, Yu. Pashkevich, P. Lemmens, S. Zvyagin, S. Gnatchenko, M. Pashchenko, X. Mo, W. Queen, and S.-J. Hwu,
Low Temp. Phys. 33, 684 (2007).

Low-temperature EPR spectrum of a CENI cluster magnet,
O. V. Kravchina, A. I. Kaplienko, A. G. Anders, D. A. Chervinskii, Yu. G. Pashkevich, A. Orendachova, and M. Kajnakova
Low Temp. Phys. 33, 987 (2007).

Orbital fluctuating state in ferromagnetic insulating LaMnO3+d (0.085<d<0.125) studied using Raman spectroscopy
K.-Y. Choi, Yu. G. Pashkevich, V. P. Gnezdilov, G. Güntherodt, A. V. Yeremenko, D. A. Nabok, V. I. Kamenev, S. N. Barilo, S. V. Shiryaev,  A.G. Soldatov, P. Lemmens,
Physical Review B 74, 064406 (2006)

Polariton excitations in nonideal topologically ordered liquid crystal’s superlattices,
Yu.G.Pashkevich, V.V.Rumyantsev and S.A.Fedorov
Liquid Crystals 1-2, 7-14 (2006) (in Russian).

Low temperature mixed spin state Co3+in LaCoO3evidenced from Jahn – Teller lattice distortions
V. Gnezdilov, K.-Y. Choi, Yu. Pashkevich, P. Lemmens, S. Shiryaev, G. Bychkov, S. Barilo, V. Fomin, A. V. Yeremenko
Low Temp. Phys. 32, 162 (2006).

Publications (2000-2005)

Evolution of the spin state of a 3d ion in a pyramidal complex,   E. S. Zhitlukhina, K. V. Lamonova, S. M. Orel, and Yu. G. Pashkevich  Low Temp. Phys. 31, 963 (2005).

Orbiton-mediated multiphonon scattering in La1−xSrxMnO3  K.-Y. Choi, P. Lemmens, G. Güntherodt, Yu. G. Pashkevich, V. P. Gnezdilov, P. Reutler, L. Pinsard-Gaudart, B. Büchner, and A. Revcolevschi, Physical Review B 72, 024301 (2005).

Phonons and magnons in stripe-ordered nickelates. A Raman scattering study. V. P. Gnezdilov, V. Kurnosov, Yu. G. Pashkevich, P. Lemmens, J. Tranquada, K.-Y. Choi, G.Güntherodt, K.Nakajama, and A.V.Yeremenko  Low Temp. Phys. 31, 154 (2005)

Existence of orbital polarons in ferromagnetic insulating La1-xSrxMn O3 (0.11 < x < 0.14) revealed by giant phonon softening, K.-Y. Choi, P. Lemmens, T. Sahaoui,G. Güntherodt, Yu. G. Pashkevich, V.P. Gnezdilov, P. Reutler, L. Pinsard-Gaudart, B. Büchner, and A. Revcolevschi  Physical Review B 71, 174402 (2005).

Phonons and magnons in stripe-ordered nickelates. A Raman scattering study, V. Gnezdilov, V. Kurnosov, A. Yeremenko, Yu. Pashkevich, P. Lemmens, J. Tranquada, K.-Y. Choi, G. Güntherodt, and K. Nakajima  Low Temp. Phys. 31, 154 (2005).

Barrier and self-energy effects in manganite tunneling characteristics  V. Svistunov, Yu. Revenko, M. Belogolovskii, A. Gerasimenko, Yu. Pashkevich, H. Szymczak, P. Przyslupski, I. Komissarov Acta Physica Polonica A 105, 87 (2004).

Interplay of structural and electronic phase separation in single-crystalline La2CuO4.05 studied by neutron and Raman scattering V. P. Gnezdilov, Yu. G. Pashkevich, J.M. Tranquada, P. Lemmens, G. Güntherodt, A.V. Yeremenko, S.N. Barilo, S.V. Shiryaev, L.A. Kurnevich, and P.M. Gehring  Physical Review B 69, 174508 (2004).

Phonon anomalies in lightly doped manganites La1-xSrxMnO 3 (x=0.09 and 0.11) near the CAF/FI phase boundary K.-Y. Choi, P. Lemmens, G. Güntherodt, Yu. G. Pashkevich, V. P. Gnezdilov, P. Reutler, B. Büchner and A. Revcolevschi J. Magn. Magn. Mater. 272-276, E305 (2004).

Magnetic exchange in a low-dimensional complex oxide (Cu,Zn)2V2 O7 V. Kataev, J. Pommer, K.-Y. Choi, P. Lemmens, A. Ionescu, Yu. Pashkevich, K. Lamonova, A. Möller, A. Freimuth, G. Güntherodt J. Magn. Magn. Mater. 272–276, 933 (2004).

Light Scattering by the Apical Oxygen Sublattice in a Thin Layer of YBaCuO Crystal V. V. Rumyantsev and Yu. G. Pashkevich Technical Physics 49, 1325 (2004).

Raman studies of single and polycrystalline cobaltatites GdBaCo2O5+d with d close to 0.5 Yu. G. Pashkevich, V. P. Gnezdilov, P. Lemmens, K.-Y.Choi, K. V. Lamonova, A. A. Gusev, G. Güntherodt, S. N. Barilo, S. V. Shiryaev and G. L. Bychkov In „Spectroscopy of Emerging Materials”, Ed. E. C. Faulques, D. L. Perry, A. V. Eremenko, Kluwer Academic Publisher, 195 (2004)

Giant phonon softening in ferromagnetic LaMnO 3+ d  Yu. G. Pashkevich, V. P. Gnezdilov, P. Lemmens, K.-Y.Choi and G. Güntherodt, A. V. Yeremenko, S. N. Barilo, S. V. Shiryaev and A. G. Soldatov In „Spectroscopy of Emerging Materials”, Ed. E. C. Faulques, D. L. Perry, A. V. Eremenko, Kluwer Academic Publisher, 185 (2004).

Magnetic resonance in low doped Cu1-x MxGeO3 with different type of 3D AFM ordering K.V. Lamonova and Yu.G. Pashkevich In „Spectroscopy of Emerging Materials”, Ed. E. C. Faulques, D. L. Perry, A. V. Eremenko, Kluwer Academic Publisher, 229 (2004)

Phonons and magnons in La5/3 Sr 1/3 NiO4 single crystal V. P. Gnezdilov, V. S. Kurnosov, Yu. G. Pashkevich, J. Tranquada, P. Lemmens, K.-Y. Choi, G. Güntherodt, A. V. Yeremenko, K. Nakajama In „Spectroscopy of Emerging Materials”, Ed. E. C. Faulques, D. L. Perry, A. V. Eremenko, Kluwer Academic Publisher, 205 (2004).

Interplay between structure and magnetism in the spin-chain compound (Cu,Zn)2V2O7 J. Pommer, V. Kataev, K.-Y. Choi, P. Lemmens, A. Ionescu, Yu. Pashkevich, A. Freimuth, and G. Güntherodt Physical Review B 67, 214410 (2003).

Tunneling Spectroscopy of High-Energy Excitations in Manganite Vladimir M. Svistunov, Yuri F. Revenko, Mikhail A. Belogolovskii, Alexander Yu. Gerasimenko, Alexander I. Khachaturov, Yurii G. Pashkevich and Eiji Hatta J. Phys. Soc. Jpn. 72, 2124 (2003).

Strong anharmonicity and spin-phonon coupling in the quasi-two-dimensional quantum spin system Sr1–xBaxCu2(BO3)2  K.-Y. Choi, Yu. G. Pashkevich, K. V. Lamonova, H. Kageyama, Y. Ueda, and P. Lemmens, Physical Review B 68, 104418 (2003).

Phonon Raman scattering in LaMn1–xCo xO3 (x =0, 0.2, 0.3, 0.4, and 1.0) V. P. Gnezdilov, Yu. G. Pashkevich, A. V. Yeremenko, P. Lemmens, G. Güntherodt, S.V. Shiryaev, G. L. Bychkov, and S. N. Barilo Low Temp. Phys. 29, 963 (2003).

Electronic Raman scattering through a stripe ordering transition in La 2-x SrxNiO4 V. P. Gnezdilov, Yu. G. Pashkevich, A. V. Yeremenko, P. Lemmens, G. Güntherodt, J. M. Tranquada, D. J. Buttrey, K. Nakajima Low Temp. Phys. 28, 510 (2002).

Light scattering on phonons in quasi-one-dimensional antiferromagnet CsFeCl3*2H2O V. S. Kurnosov, Yu. G. Pashkevich, A. V. Peschanskii, V. I. Fomin and A. V. Yeremenko Low Temp. Phys. 28, 516 (2002).

Ultrasonic investigation of Nd0.5Sr 0.5MnO3 S. Zvyagin, H. Schwenk, B. Lüthi, K. V. Kamenev, G. Balakrishnan, D. McK. Paul, V. I. Kamenev, and Yu. G. Pashkevich  J. Magn. Magn. Mater. 226, 882 (2001).

 Phase separation, charge ordering, and pairing in layered three-dimensional systems Yu. G. Pashkevich, A.E. Filippov Physical Review B 63, 113106 (2001).

Nuclear quadrupole resonance of barium in BaBiO 3 and BaPbO3 M. M. Savosta, V. D. Doroshev, V. A. Borodin, Yu. G. Pashkevich, V. I. Kamenev, T. N. Tarasenko, J. Englich, J. Kohout, A. G. Soldatov, S. N. Barilo, S. V. Shiryaev  Physical Review B 63, 184106 (2001).

Stripe conductivity in La 1.775Sr 0.225NiO4  Yu. G. Pashkevich, V. A. Blinkin, V. P. Gnezdilov, V. V. Tsapenko, V. V. Eremenko, P. Lemmens, M. Fischer, M. Grove, G. Güntherodt, L. Degiorgi, P. Wachter, J. M. Tranquada, D. J. Buttrey Physical Review Letters 84, 3919 (2000).

Magnetic-field penetration and structure of the mixed state in a superconductor with a multicomponent order parameter A. S. Zeltser, Yu. G. Pashkevich, A. E. Filippov  Physical Review B 62, 9688 (2000).

Ultrasonic and magnetic studies of Nd0.5 Sr0.5MnO3 S. Zvyagin, H. Schwenk, B. Lüthi, K. V. Kamenev, G. Balakrishnan, D. McK Paul, V. I. Kamenev, and Yu. G. Pashkevich Physical Review B 62, R6104 (2000).

 Local distortions in Ba1-xKx BiO 3 observed in low frequency phonon Raman scattering Yu. G. Pashkevich, V. P. Gnezdilov, A. V. Eremenko, P. Lemmens, G. Güntherodt, W. Reichardt, M.Braden, S.V.Shiryaev, S.N.Barilo and A.G.Soldatov Int. J. Mod. Phys. B 14, 3637 (2000).

The valence state of bismuth in BaBiO3 probed by NQR M. M. Savosta, J. Englich, J. Kohout, V. D. Doroshev, V. A. Borodin, Yu. G. Pashkevich, A.G. Soldatov, S. N. Barilo, and S. V. Shiryaev Physica C 341-348, 943 (2000).

 Gyrotropy of Molecular Crystals with Vacancies Yu. G. Pashkevich, S. A. Fedorov  Optics and Spectroscopy 88, 448 (2000)

 Optical Studies of the incommensurate charge ordered phase in La1.775Sr 0.225 NiO4  Yu. G. Pashkevich, V. A. Blinkin, V. P. Gnezdilov, V. S. Kurnosov, V. V. Tsapenko, V. V. Eremenko, P. Lemmens, M. Fischer, M. Grove, G. Güntherodt, L.Degiorgi, P. Wachter, J. M. Tranquada, D. J. Buttrey Physica B 284-288, 1473 (2000)

 Selected Publications (1981-1999)

Magnetic flux structure and formfactor of SANS in a superconductor with multicomponent order parameter A. S. Zeltser, Yu. G. Pashkevich, A. E.Filippov Phys. Lett. A 260, 120 (1999).

Visualization of the antiferromagnetic insulator–ferromagnetic metal phase transition in manganite Nd0.5Sr0.5MnO3  S. L. Gnatchenko, A. B. Chizhik, I. O. Shklyarevski, D. N. Merenkov, V. I. Kamenev, Yu. G. Pashkevich, K. V. Kamenev, G. Balakrishnan, and D. McK. Paul  Low Temp. Phys. 25, 744 (1999).

 Spin-phonon correlations and optical excitations in oxides Yu. Pashkevich, A. Yeremenko In “Phys. and Mater. Sc. of HTSC, IV”  Ed. R. Kossowsky et al.  Kluwer Academic Publishers, Dordrecht, 101 (1997).

 On the optical features of layered oxides Yu. G. Pashkevich, A. V. Yeremenko Nuovo Cimento 19D, 1167 (1997).

 Magnetic-ordering-induced one phonon infrared absorption in Nd2CuO4 Yu. G. Pashkevich, V. V. Pishko, V. Tsapenko, and A. V. Eremenko JETP (USA) 82, 773 (1996).

Structural distortions in Nd2CuO4 Yu. G. Pashkevich, V. V. Pishko, V. V. Tsapenko, and A. V. Eremenko Low Temp. Phys. (USA) 21, 587 (1995).

Theory of Raman light scattering in the many sub-lattice exchange-noncollinear magnets UO2, RMnO3, and Nd2CuO4 (R=rare earth ion) Yu. G. Pashkevich, V. L. Sobolev, S. A. Fedorov and A. V. Eremenko  Physical Review B 51, 15898 (1995).

Two magnon-absorption of electromagnetic waves in the exchange noncollinear antiferromagnet Nd2CuO4 V. L. Sobolev, Yu. G. Pashkevich, H. L. Huang, I. M. Vitebskii, V. A. Blinkin Physical Review B 51, 1010 (1995).

Magnon contribution to the heat capacity of manysublattices antiferromagnets La2CuO4 and CuCl2×2H2O Yu. G. Pashkevich, V. V. Shakhov, V. A. Blinkin, V. L. Sobolev, A. A Zakharov, A. V. Suetin, and M. N. Khlopkin Low Temp. Phys. 20, 335 (1994).

Exchange mechanism of Raman light scattering in impurity La2 CuO4 Yu. G. Pashkevich and S. A. Fedorov Low Temp. Phys. 20, 180 (1994).

Spin-wave spectrum and inelastic neutron scattering by magnons in Nd 2CuO4 V. L. Sobolev, H. L. Huang, Yu. G. Pashkevich, M. M. Larionov, I. M. Vitebsky and V.A. Blinkin, Physical Review B 49, 1170 (1994).

Infrared reflection spectra of cooled BaFe12O19  A. V. Eremenko, Yu. G. Pashkevich, V. V. Pishko and V. V. Tsapenko Physica B 194-196, 189 (1994).

 On symmetry classification of the spin-waves excitations of magneto ordered crystals Yu. G. Pashkevich and S. A. Fedorov Ukr. Phys. J. 38, 279 (1993) (in Russian).

Spin-reorientation phase transition in Nd2CuO4 in an external magnetic field: unusual manifestation of magnetoelastic coupling V. L. Sobolev, H. L. Huang, I. M. Vitebskii, A. N. Knigavko, and Yu. G. Pashkevich  Physical Review B 48, 3417 (1993).

Antiferromagnetic resonance in Nd2CuO4 V. A. Blinkin, Yu. G. Pashkevich, V. V. Eremenko, S. A. Zvyagin, and V. V. Pishko Sov. J. Low Temp. Phys. (USA) 18, 848 (1992).

Resonance properties of the four-sublattice antiferromagnet CuCl2 ×2H2O V. V. Eremenko, S. A. Zvyagin, Yu. G. Pashkevich, V. V. Pishko, and V. V. Shakhov Sov. J. Low Temp. Phys. (USA) 18, 175 (1992)

Magnetic resonance exchange modes for barium hexaferrite A. V. Eremenko, Yu. G. Pashkevich, V. L.Sobolev, and S. A. Fedorov Proc. of the Six Int. Conf. on ferrites (ICF6) Tokyo and Kyoto, Japan, 741 (1992).

 Microscopic theory of natural optical activity of mixed molecular crystals Yu. G. Pashkevich and S. A. Fedorov Optics and spectroscopy (USSR) 71, 563 (1991).

 Microscopic theory of electrooptical activity of molecular crystals Yu. G. Pashkevich and S. A. Fedorov Sov. Phys. Crystallogr. 36 (6), 771 (1991).

Line width of magnetic resonance exchange modes in a four-sublattice orthorhombic antiferromagnet V. G. Bar’yakhtar, V. V. Eremenko, S. A. Zvyagin, Yu. G. Pashkevich, V. V. Pishko, V. L. Sobolev, and V. V. Shakhov Sov. Phys.-JETP. (USA) 73, 1046 (1991).

One-magnon light scattering in exchange-noncollinear Nd 2CuO4 I.M. Vitebsky, A. V. Eremenko, Yu. G. Pashkevich, V. L. Sobolev, and S. A. Fedorov Physica C 178, 189 (1991).

One-magnon light scattering in high-temperature superconducting materials. La2CuO4 V. Eremenko, Yu. G. Pashkevich, V. L. Sobolev, and S. A. Fedorov Sov. Phys. Solid State (USA) 32, 622 (1990).

AFMR spectrum and the energy gap of the orthorhombic antiferromagnet near a transition of the sublattice-collapse type V. N. Vasyukov, A. I. Izotov, Yu. G. Pashkevich, and V. T. Telepa Sov. Phys. Solid State (USA) 31, 139 (1989).

 Light scattering on magnons in many-sublattice antiferromagnets in a magnetic field Yu. G. Pashkevich, V. L. Sobolev and S. A. Fedorov J. Phys. C: Solid State Phys. 21, 1265 (1988).

Temperature dependence of exchange modes of an antiferromagnetic resonance in CuCl2×2H2O V. V. Eremenko, S. A. Zvyagin, Yu. G. Pashkevich, V. V. Pishko, V. L. Sobolev, and V. V. Shakhov Sov.Phys.Solid State (USA) 30, 729 (1988).

Two-magnon absorption and characteristics of the spin-wave spectrum of multisublattice antiferromagnets V. V. Eremenko, S. A. Zvyagin, Yu. G. Pashkevich, V. V. Pishko, V. L. Sobolev, and S. A. Fedorov Sov. Phys.-JETP 93, 1893 (1987).

 Resonance properties of four-sublattice rhombic antiferromagnet in the fields normal to the easy axis Yu. G. Pashkevich, V. L. Sobolev and V. V. Shakhov Sov. J. Low Temp. Phys. (USA), 12, 545 (1986).

 Light scattering by exchange magnons in multisublattice antiferromagnets in magnetic field Yu. G. Pashkevich, V. L. Sobolev and S. A. Fedorov Sov. J. Low Temp. Phys. (USA) 12, 237 (1986).

Exchange modes in antiferromagnetic CuCl2×2H2O V. G. Bar’yakhtar, V. V. Eremenko, V. M. Naumenko, Yu. G. Pashkevich, V. V. Pishko, and V. L. Sobolev Sov. Phys.-JETP (USA) 61, 823 (1985).

Magnetoacoustic resonance in antiferromagnets near a transition of the sublattice-collapse type V. G. Bar’yakhtar, I. M. Vitebskii, Yu. G. Pashkevich, V. L. Sobolev and V. V. Tarasenko Sov. Phys. Solid State (USA) 26, 1829 (1984).

Striction effects and dynamics of the magnetic subsystem at spin-reorientation phase transitions. Symmetry aspects V. G. Bar’yakhtar, I. M. Vitebskii, Yu. G. Pashkevich, V. L. Sobolev and V. V.Tarasenko Sov. Phys.-JETP (USA) 60, 587 (1984).

”Relaxation” mechanism of gap formation in the soft-mode spectrum due to a spin-reorientation phase transition  V. G. Bar’yakhtar, I. M. Vitebskii, Yu. G. Pashkevich and V. L. Sobolev Sov. Phys. Solid State (USA) 26, 1080 (1984).

Antiferromagnetic resonance in (C2H5 NH3)2×CuCl4 orthorhombic antiferromagnet with Dzyaloshinskii interaction V. N. Vasyukov, A. V. Zhuravlev, S. N. Lukin, Yu. G. Pashkevich, V. L. Sobolev and V. T. Telepa Sov. Phys. Solid State (USA) 26, 790 (1984).

Observation of Exchange Modes of Antiferromagnetic Resonance in CuCl2 ×2H2O V. V. Eremenko, V. M. Naumenko, Yu. G. Pashkevich and V. V. Pishko JETP Lett. (USA) 38, 112 (1983).

Light scattering by magnons and magneto-optical effects in multisublattice magnets V. G. Bar’yakhtar, Yu. G. Pashkevich and V. L. Sobolev Sov. Phys.-JETP (USA) 58, 945 (1983).

Influence of uniaxial pressure on the Neel temperature of antiferromagnet CuCl2×2H2O  
V. A. Galushko, V. P. Kulbatskii, Yu. G. Pashkevich, V. L. Sobolev and V. T. Telepa
Sov. Phys. Solid State (USA) 25, 527 (1983).

Symmetry analysis of the static and high-frequency properties of CuCl2×2H2O and CuCl2 ×2D2O
Yu. G. Pashkevich, V. L Sobolev and V. T. Telepa
Sov. J. Low Temp. Phys. (USA) 8, 351 (1982).

Pressure dependence of the magnetic properties of CuCl2 ×2D2O at low temperatures
V. A. Galushko, S. V. Ivanova, Yu. G. Pashkevich and V. T. Telepa Sov. J. Low Temp. Phys. (USA) 7, 433 (1981).

 Optical Activity Caused by Exciton Dispersion
Yu. G. Pashkevich and A. D. Petrenko
Optics and spectroscopy (USSR) 51, 306 (1981).

Effective Field Method and Raman Scattering by Intramolecular Vibrations in Molecular Crystals  L. N. Ovander, Yu. G. Pashkevich and N. S. Tyu
Optics and spectroscopy (USSR) 51, 452 (1981).

Theory of Frenkel Excitons and the Effective Field Method
L. N. Ovander, Yu. G. Pashkevich and N. S. Tyu
Optics and spectroscopy (USSR) 50, 622 (1981).