Abstract

The static and dynamic properties of an anisotropic ferrimagnet, which has sublattices with S = 1 and σ = 1/2 and is characterized by a non-Heisenberg (spin bilinear or biquadratic) exchange interaction for the sublattice with S = 1, are studied. The anisotropy is determined by the Ising interaction of the sublattices. When the non-Heisenberg exchange interaction of the sublattice with S = 1 is taken into account, the anisotropic system is shown to be in a phase with vector order parameters (ferrimagnetic phase) and in a phase characterized by both vector and tensor order parameters (quadrupole-ferrimagnetic phase). The type of the phase transition between these phases and the condition of compensating the magnetic moments of the sublattices are determined.

中文翻译：

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非海森堡各向异性铁磁体

摘要

各向异性亚铁磁，它与亚晶格的静态和动态特性小号= 1和σ= 1/2并且其特征在于一个非海森堡（自旋双线性或双二次），用于与亚晶格交换相互作用小号= 1，进行了研究。各向异性是由亚晶格的伊辛相互作用决定的。当考虑亚晶格与S = 1的非海森堡交换相互作用时，各向异性系统显示为处于具有矢量阶参数的相（亚铁磁相）以及处于具有矢量和张量阶参数（四极亚铁磁性相）。确定这些相位之间的相变类型以及补偿亚晶格磁矩的条件。