Department of Magnetism

Group of magnetic and magnetic-resonance investigation



Staff (Members of the group)

  1. E. Khatsko, Doctor of Sciences (Physics & Mathematics), leading researcher, head of the group;
  2. M. Kobets, Candidat of Sciences (Physics & Mathematics), senior researcher;
  3. V. Ponomarchuk, Candidat of Sciences (Physics & Mathematics), senior researcher;
  4. A. Cherny, Candidat of Sciences (Physics & Mathematics), researcher;
  5. K. Dergachev, Candidat of Sciences (Physics & Mathematics), researcher;
  6. A. Rykova, junior researcher;
  7. P. Kalinin, leading engineer

The main field of research

  • Resonant, and dynamic magnetic characteristics of strongly anisotropic magnetic dielectrics;
  • Phase transitions and relaxation processes in low-dimensional structures;
  • Nonstationary and nonlinear phenomena in nonmagnetic crystals

The most important results

  • Detection of high frequency exchange modes in antiferromagnetic resonance;
  • Detection and investigation of nonstationary chaotic regimes in antiferromagnetic resonance in low-dimensional antiferromagnetics;
  • Detection of temperature-induced rotation of magnetic susceptibility tensor axes in monoclinic crystal;
  • Investigation of noncollinear structures in Ising magnetic;
  • Detection of magnetic field induced structural phase transition in low-dimensional magnetic;
  • Detection of quantum tunneling of magnetic moment in Ising chaines at ultra low temperatures

Equipment
Experimental setup fof resonant investigations in 10 Hz- 200GHz frequency range and investigation of static and dynamic susceptibility. The temperature range is from room temperature up to 0.5 K and available magnetic fields are up to75 kOe (permanent) and 250 kOe (pulse). Static and dynamic magnetic properties investigation are feasible in temperature range 0.5 – 300 K in magnetic fields up to 20 kOe.
Facilities available:




– 1. Microwave spectrometer (11 - 200 GHz) with
continuous magnetic field up to 75 KOe and
temperature range 1.5-200 K;


– 2. Microwave spectrometer (16 - 150 GHz) with
pulse magnetic field up to 250 KOe and
temperature range 1.5-300 K;








– 3. Vibration magnetometer to measure magnetic
susceptibility and magnetization in magnetic fields
0 - 20 kOe at temperatures 0.5 – 300 K.

– 4. A setup to measure dynamic magnetic
susceptibility at frequencies 10 Hz – 100 MHz and
temperatures 0.5 - 300K.

– 5. Vibration magnetometer with transversal
superconducting solenoid 20kOe and
temperature range 1.8 – 300 K.




International cooperation

  • Institute of Physics of Polish Academy of Science, Warsaw, Poland;
  • L. Neel Institute of National Centre of Scientific Investigation (CNRS), Grenoble, France;
  • International Laboratory of Strong Magnetic Fields and Low Temperarures, Wroclaw, Poland

Recent publications

  1. Е.Н. Хацько, А.С. Черный, А.И. Рыкова, M.T. Боровец, В.П Дьяконов, Г. Шимчак, Низкотемпературные магнитные свойства моноклинного магнетика RbDy(WO4)2, ФНТ, 29, с. 1328-1334,. 2003.
  2. C.Boscovic, R.Bircher, P.L.W. Tregenna-Pigott, H.U.Gugel, C.Paulsen, W.Wemsdorfer, A.-L Barra, E. Khatsko, A.Neels, V.Stoeckli-Evans, Ferromagnetic and antiferromagnetic intermolecular interactions in a new family of Mn4 complexes with an energy barrier to magnetization reversal, Journal of the American Chemistry Society, 125, № 46, p.4045-4068, 2003.
  3. E.N. Khatsko, A.Zheludev, J.M.Tranquada, W.T.Klooster, A.M.Knigavko, R.C.Srivastava Neutron scattering study of the layered Ising magnet CsDy(MoO4)2 ФНТ. 30, № 2, с. 184-192, 2004.
  4. К.Г. Дергачев, М.И. Кобец, Е.Н. Хацько, Магниторезонансные исследования низкоразмерного магнетика NaFe(WO4)2, ФНТ, 31, с. 530-535, 2005.
  5. К.Г. Дергачев, М.И. Кобец, А.А. Логинов, Е.Н. Хацько, Исследование электронного парамагнитного резонанса в синглетном магнетике KTb(WO4)2, ФНТ, 31, с. 1130-1142, 2005.
  6. А.А. Логинов, Е.Н. Хацько, А.С. Черный, В.Н. Баумер, А.И. Рыкова, П.С. Калинин, А. Сульпис, Магнитные свойства синглетного антиферромагнетика KTb(WO4)2 ФНТ, 32, с. 91-102, 2006.
  7. К.Г. Дергачев, М.И. Кобец, Е.Н. Хацько, М. Ланг, В.А. Пащенко, Магниторезонансные свойства низкоразмерного антиферромагнетика Mn[C10H6(OH)(COO)]2x2H2O, ФНТ, 32, с. 306-316, 2006.
  8. А.С. Черный, К.Г. Дергачев, М.И. Кобец, Е.Н. Хацько, Магнитные и резонансные свойства соединения
    (NH3)2(CH2)3CoCl4 – антиферромагнетика с взаимодействием Дзялошинского, ФНТ, 32, c. 1233-1240, 2006.
  9. E. Khatsko, A. Loginov, A. Cherny, A. Rykova, Magnetic properties of the strongly correlated chain antiferromagnet KTb(WO4)2, Physica B, 378-380, p. 1126-1127, 2006.
  10. E. Lhotel, E. N. Khatsko and C. Paulsen, Resonant quantum tunneling of spin chains in a three-dimensional magnetically ordered state, PRB 74, p.020402, 2006.
  11. К.Г. Дергачев, М.И. Кобец, Е.Н. Хацько, В.М. Хрусталев, Спиновая динамика и магнитные фазовые переходы в квазидвумерном антиферромагнетике Mn[C10H6(OH)(COO-)]2x2H2O, ФНТ, 33, c. 570-577, 2007.
  12. Gnatchenko S., Kobets M., Khatsko E., Baran M.,Shymczak R., Lemmens P., and Berger H., Magnetic and Resonance Properties Of The Two-Dimensional S=1 Compound Ni5(TeO3)4Cl2 with Frustrated Geometry, ФНТ, 34, с. 798–803, 2008
  13. А.И. Рыкова, А.С.Черный, Е.Н. Хацько А.Д. Шевченко, В.Н. Уваров, Особенности магнитных свойств
    р-La0,78 Mn0,99 O3,5 и p-La0,80 Mn1,04O3,5, полученных в условиях высокого 7,5 ГПа давления, ФНТ, 34,
    с. 1163–1166, 2008.