Laboratory of the Resonance Properties of Magnetically Ordered Media

лаборатория рсмув

Laboratory Staff

Advanced developments

Selected Publications

In 2015, a series of studies Electron and Magnetic Phase Transitions in Cation-Substituted Manganese Chalcogenides by S. Aplesnin, O. Romanova, L. Udod, G. Makovetskii, K. Yanushkevich, O. Demodenko, and A. Galyas was awarded the Academician Valentin A. Koptyug Prize by the Presidium of the Siberian Branch of the Russian Academy of Sciences.

 Research Focus

  • Search for and synthesis of new single-crystal and polycrystalline magnetically ordered materials; experimental study of the magnetic structure and magnetic phase diagrams of these materials with the use of magnetometry, the Mössbauer effect, and magnetic resonance techniques, including ESR, FMR, and AFMR.
  • Study of the magnetic state of nanoparticles in magnetically active materials.
  • Theoretical analysis of magnetic structures and exchange interactions in the crystals; symmetrical analysis of crystals; construction of microscopic and phenomenological theories of the occurrence of incommensurable and noncollinear magnetic structures.
  • Study of the magnetic and transport properties of compounds based on 3d and 4f metals sulfides.

Research Techniques

  • Flux synthesis of single crystals; high-rate melt-quenching amorphization; solid-state synthesis
  • SQUID magnetometry and resistivity measurements for studying magneto- and electrostatic characteristics of materials
  • ESR, AFMR (dc and pulsed magnetic fields), and optical rf double resonance for studying the resonance properties of nonmetal magnets
  • Mössbauer spectroscopy
  • Analytical calculations and numerical simulation

The measurements are performed at temperatures 4.2—300 K in magnetic fields of up to 120 kOe.

Collaboration

  • Laue-Langevin Institute, Grenoble, France
  • Paul Scherrer Institute, Villigen, Switzerland
  • University of Fukui, Japan
  • Osaka University, Japan
  • Institute of Physics, Polish Academy of Sciences
  • Institute of Solid State and Semiconductor Physics, National Academy of Science of Belarus
  • Institute of Solid State Physics, University of Latvia
  • Institute of Metal Physics, Russian Academy of Sciences, Ural Branch
  • Institute of Catalysis, Russian Academy of Sciences, Siberian Branch
  • Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch
  • Institute of Biophysics, Russian Academy of Sciences, Siberian Branch
  • Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, Siberian Branch

лаборатория рсмув

Equipment

  • Laboratory complex for synthesis of crystals and amorphous compounds.
  • SQUID magnetometer.
  • MS1104Em Mössbauer spectrometer.
  • ESR spectrometer complex for observation and detection of the first or second ESR signal derivatives, determination of the number of paramagnetic centers in a substance, and investigations of temperature and angular dependences of spectral parameters.
  • Magnetic resonance spectrometers (stationary and pulsed magnetic fields).
  • Optical rf double resonance spectrometer.
  • Automated setup for measuring the magnetocaloric effect and studying the transport properties of crystals with sensitivity of 0.01 K in magnetic fields up to 25 kOe. The resistivity, magnetoimpedance, and Hall effect are measured in the dc range 5 µA--5mA at voltages of 0.5--10 V.
  • Setup for measuring permittivity at frequencies up to 100 kHz in the temperature range 4.2--300 K in magnetic fields up to 15 kOe
  • Automated vibrating sample magnetometer with a Puzei electromagnet.

Engineering

  • Unique original SQUID magnetometer based on a dc current sensor with an absolute sensitivity of 1×10-7 G×cm3, a dynamic range of up to 5×10-2 G×cm3, a magnetic field range of up to 2000 Oe, and a temperature range of 4.2–300 K.
  • Original vibrating sample magnetometer with a sensitivity of 10-4 G×cm3, a magnetic field range of up to 20 kOe, and a temperature range of 77.4–300 K.