Department of Magnetism

Institute for Low Temperature Physics and Engineering

Head of the Department: Doctor of Sciences (Physics & Mathematics), Professor, Corresponding Member of NAS of Ukraine

Sergey Leonidovich GNATCHENKO

+ (380)-57-340-22-23 fax: + (380)-57-340-33-70, + (380)-57-345-05-93

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The Department was founded in 1994 by integrating several research teams of the Department of Low Temperature Magnetism (headed by V.V. Eremenko, Academician of the National Academy of Sciences of Ukraine (till 1986) and N.F. Kharchenko, Corresponding Member of the National Academy of Sciences of Ukraine (since 1986)) and several teams of the Department of Infrared Spectroscopy (headed by A.I. Zvyagin, Corresponding Member of the National Academy of Sciences of Ukraine, 1966 - 1991). Since 1994 the head of Department is academician of NAS of Ukraine S.L.Gnatchenko.

At present the Department includes 16 co-workers, among which: 2 Doctors of Sciences (DS) - (S.L. Gnatchenko, V.P. Gnezdilov) 10 Candidates of Sciences (Ph. D.) - (V.A. Bedarev,  A.V. Eremenko, I.S. Kachur, V.S. KurnosovD.N. Merenkov, V.A. PashchenkoM.I. Pashchenko, A.V. Peschanskii, V.G. Piryatinskaya,  V.V. Tsapenko).

Main scientific fields:

  • magnetic, high frequency and resonant properties of magnets;
  • spontaneous and magnetic-field induced spin-orientation phase transitions in magnetically ordered insulators, metallic magnetic superlattice and nanostructures;
  • structural phase transitions in magnetic dielectrics;
  • non-uniform magnetic states formed at magnetic and structural phase transitions;
  • dynamics of a crystal lattice, light scattering on electronic and magnetic excitations;
  • optical, millimetric and infra-red spectroscopy of magnetically-ordered crystals;
  • photoinduced phenomena in magnetic crystals.

The most important results:

  • Detection of non-uniform states near the phase transitions induced by a magnetic field in antiferromagnets and ferrimagnets, research of their static and dynamic properties;
  • Detection of photoinduced linear birefringence and absorption in antiferromagnetic and paramagnetic manganese garnets; detection of the photoinduced phase transitions in manganese oxides;
  • Detection of surface and volume noncollinear structures induced by a magnetic field in multilayered nanostructural films and superlattices;
  • Detection of peculiarities of fine structure of exiton-magnon absorption of light, caused by high density of states at the bottom of a spin-wave zone in low-dimensional antiferromagnets;
  • Detection of the effect of huge phonon mode softening in doped manganites below metal-insulator transition temperature;
  • Detection of a fluctuating spin-state phase and a wipeout of the low-frequency phonon-scattering intensity under the influence of temperature and electromagnetic radiation in Fe2+ coordination polymer;
  • Detection of high-frequency exchange modes of an antiferromagnetic resonance;
  • Detection and research of non-stationary chaotic modes of antiferromagnetic resonance in low-dimensional antiferromagnet;
  • Detection of the structural phase transitions induced by a magnetic field in low-dimensional magnets;
  • Detection of the magnetic moment quantum tunneling in Ising chains at ultralow temperatures;
  • Detection of one-phonon absorption and light scattering in crystals induced by reduction of Brillouin zone at magnetic ordering;
  • Detection of charge stripe-ordering effect on phonon and magnon spectra in low-dimensional nickelates.

Awards:
The State Prize of Ukraine in the field of a science and technnology for series of works “New optical and magnitooptical phenomena in antiferromagnets” (2004). Authors: S.L. Gnatchenko, V.P. Gnezdilov, A.V. Eremenko, V.I. Fomin, N.F. Kharchenko, I.E. Chupis (B.I. Verkin Institute for Low Temperature Physics and Engineering NAS of Ukraine), I.L. Lyubchansky, Yu. G. Pashkevich (A.A. Galkin Dînetsk Institute for Physics and Engineering NAS of Ukraine), E.G. Petrov (N.N. Bogolyubov Institute of theoretical physics NAS of Ukraine).
Prize of the USSR Academy of Sciences and the Polish Academy of Sciences for magnetooptical research of non-uniform states in magnetics (1987). Authors: V.V. Eremenko, N.F. Kharchenko, S.L. Gnatchenko(B.I. Verkin Institute for Low Temperature Physics and Engineering NAS of Ukraine), G. Szymczak, R. Szymczak, K. Petrovskii, A. Shevchik (Institute of Physics of Polish Academy of Sciences).

Projects and grants:
Joint scientific project of NAS of Ukraine and the Russian foundation for fundumental research “New concepts in the physics of low-dimensional magnetism”.
The project “Synthesis and researches of properties of nanostructural materials on the basis of complex oxides and carbides” with the program “Nanostructural systems, nanomaterials, nanotechnology” National Academy of Sciences of Ukraine.
Joint scientific project of NAS of Ukraine and the Polish Academy of Sciences “Influence of low dimension and frustration on magnetic and optical properties of magnetics at low temperatures”.

Resent dissertations:
V.V. Tsapenko - "Experimental research of influence of many-grating magnetic structure on phonon spectra of crystals", PhD, speciality 01.04.11 - magnetism, supervisor - Dr. V.V. Pishko, Kharkov-2001.
D.N. Merenkov - “Spontaneous and magnetic field induced spin configurations in multilayered films Fe/Si, Gd/Co, Gd/Fe”, PhD, speciality 01.04.11 - magnetism, supervisor – Prof. S.L. Gnatchenko, Kharkov-2003.
V.I. Gapon - “Influence of light on the phase transitions induced by a magnetic field in manganese oxides Ca3Mn2Ge3O12 and Pr0.6La0.1Ca0.3MnO3”, PhD, speciality 01.04.11 - magnetism, supervisor – Prof. S.L. Gnatchenko, Kharkov-2006.
K.G. Dergachev - “Peculiarities of magnetoresistive properties of low-dimensional compounds with magnetic ions Co2+, Mn2+, Fe3+, Tb3+”, PhD, speciality 01.04.11 - magnetism, supervisor – DS E.N. Khatsko, Kharkov-2007.
 V.P. Gnezdilov - "Raman scattering in high correlated electronic systems", DS, speciality 01.04.11 - magnetism, Kharkov-2014.
A.I. Rykova - "Peculiarities of low temperature magnetic transformations of rare-earth elements double wolframates", PhD, speciality 01.04.11 - magnetism, supervisor – DS E.N. Khatsko, Kharkov-2012
M.I. Pashchenko
- "Magnetooptical and magnetic properties of rare-earth ferroborates TbFe3(BO3)4, TbAl3(BO3)4, NdFe3(BO3)4", PhD, speciality 01.04.11 - magnetism, supervisor – Dr. V.A. Bedarev, Kharkov-2015.


The international cooperation:
Institute of Physics of the Polish Academy of Sciences, Warsaw, Poland;
Argonne National Laboratory, Argonne, the USA;
University of Basque Country, San Sebastian, Spain;
L.V.Kirensky Institute of Physics Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia;
Moscow State University, Moscow, Russia;
Institute for Condensed Matter Physics, TU Braunschweig, Braunschweig, Germany;
Chung-Ang University, Seoul, Korea;
Institute of Applied Physics of the Moldavian Academy of Sciences, Kishinev, Moldova;
Institute of Solid State Physics and Semiconductors of the Belarus Academy of Sciences, Minsk, Belarus;
Institute for Microstructural Sciences National Research Council of Canada, Ottawa, Canada;
The International Laboratory of Strong Magnetic Fields and Low Temperatures, Wroclaw, Poland;
L.Neel Institute of the National Centre of Scientific Researches of France, Grenoble, France.

Research groups of department: