Description of ordering, temperature dependence of susceptibility, and magnetostriction of a one-sublattice spin system withS=1and strong biquadratic exchange
作者:
V. M. Kalita,
A. F. Lozenko,
期刊:
Low Temperature Physics
(AIP Available online 1998)
卷期:
Volume 24,
issue 10
页码: 721-725
ISSN:1063-777X
年代: 1998
DOI:10.1063/1.593674
出版商: AIP
数据来源: AIP
摘要:
The magnetic ordering model is considered for a single-lattice spin subsystem withS=1and a large biquadratic exchange whose energy has the same order of magnitude as the bilinear exchange interaction energy. The expression for free energy is obtained in the microscopic approximation, and the phase states are defined and analyzed. The Landau potential is represented as a power expansion in the model microscopic free energy. This expression is used to describe the peculiarities of the temperature dependences of the magnetic susceptibility and magnetoelastic deformation. ©1998 American Institute of Physics.
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