Group of investigations in pulse magnetic field
Members of the group:
Savytskyi V.M., Head of the group, Candidate of Sciences (Ph.D), researcher.
Khrustalyov V.M., Candidate of Sciences (Ph.D), junior researcher;
The main field of research:
Low temperature studies of magnetic field induced spin-orientational phase transitions in antiferromagnets with strong magnetic anisotropy.
Experimental studies of magnetic and electric properties of multiferroic compounds under high pulsed magnetic field.
Equipment:
The pulse magnet with field strenght up to 300 kOe within the hole diameter 27 mm (copper wired multilayer coil with liquid nitrogen cooling) for magnetization (differential magnetic susceptibility) and magnetoelectric effect measurements. Magnetic field pulse diration 30 ms. Sample temperature intervals: 1,6-4,2 Ê (liquid helium), 14-20,4 Ê (liquid hydrogen).
DC superconducting magnet with field up to 6 Ò for magnetization and magnetic susceptibility measurement in the tempereture interval 1.6 - 300 K.
DC water-cooled magnet with field up to 1.5 T for magnetic properties measurements at room and helium temperatures.
The most important results:
The phase (Í,Ò)-diagrams of magnetic states for LiCoPO4 in magnetic field up to 285 kOe has been constructed. The second high-field phase (H > H2) has been found to be non-centrosymmetrical with magnetoelectric response
The new high-field magnetic phase in LiCoPO4 has been found within the field interval 21-28.5 T and was showed that transition from antiferromagnetic to saturated paramagnetic state occurs through three phase transitions. The possible magnetic structures formed in LiCoPO4 in high-field phases (H > H1) are proposed within the framework of the simplified two-dimensional collinear model
The five phase transitions has been found in LiNiPO4 during pulse magnetization in the field up to 285 kOe. The phase (Í,Ò)-diagrams in magnetic field up to 285 kOe has been constructed