DESCRIPTION OF ORDERING, TEMPERATURE-DEPENDENCE OF SUSCEPTIBILITY, AND MAGNETOSTRICTION OF A ONE-SUBLATTICE SPIN SYSTEM WITH S=1 AND STRONGBIQUADRATIC EXCHANGE
Vm. Kalita et Af. Lozenko, DESCRIPTION OF ORDERING, TEMPERATURE-DEPENDENCE OF SUSCEPTIBILITY, AND MAGNETOSTRICTION OF A ONE-SUBLATTICE SPIN SYSTEM WITH S=1 AND STRONGBIQUADRATIC EXCHANGE, Low temperature physics (Woodbury, N.Y.), 24(10), 1998, pp. 721-725
The magnetic ordering model is considered for a single-lattice spin su
bsystem with S = 1 and a large biquadratic exchange whose energy has t
he same order of magnitude as the bilinear exchange interaction energy
. The expression for free energy is obtained in the microscopic approx
imation, and the phase states are defined and analyzed. The Landau pot
ential is represented as a power expansion in the model microscopic fr
ee energy. This expression is used to describe the peculiarities of th
e temperature dependences of the magnetic susceptibility and magnetoel
astic deformation. (C) 1998 American Institute of Physics. [S1063-777X
(98)00510-6]