Low Temperature Physics: 36, 558 (2010); https://doi.org/10.1063/1.3457377 (7 pages)
Fizika Nizkikh Temperatur: Volume 36, Number 6 (June 2010), p. 698-706    ( to contents , go back )

Induced by magnetic field spin reorientation in strongly anisotropic antiferromagnetic crystal LiCoPO4

M.F. Kharchenko, V.M. Khrustalyov, and V.N. Savitsky

B.I. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: kharchenko@ilt.kharkov.ua
khrustalyov@ilt.kharkov.ua

pos Анотація:

Received March 18, 2010

Abstract

It was experimentally found that destroying of antiferromagnetic order by magnetic field applied along the antiferromagnetic axis (H || b) in strong-anisotropic orthorhombic antiferromagnetic crystal LiCoPO4 (TN = 21.7 K) occurs by three phase transitions — two transitions of the first order at H1 = 118 kOe and H2 = 224 kOe, and the second order one at H3 = 283 kOe (T = 1.7 K). In the field range H2 < H < H3 linear change of magnetization of crystal was found. The possible magnetic structures, formed in magnetic field, were discussed. The values of exchange interaction parameters were estimated.

PACS: 75.50.Ee Antiferromagnetic materials;
PACS: 75.30.Kz Magnetic phase transitions;
PACS: 75.60.Ej Magnetization of magnetic materials.

Key words: LiCoPO4, high anisotropic antiferromagnet, magnetic phase transitions, pulse magnetic field.

Download 849222 byte View Contents