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摘要翻译：
提出了在单离子各向异性为“易平面”型、离子自旋S=1的van Vleck单重态磁体中，由外加磁场诱导量子相变到反铁磁态的理论描述。结果表明，基态非简并态的自旋极化是这种跃迁的序参量，可以用Landau热力学方法来描述它的跃迁。研究了反铁磁相在不同方向场中的磁化率和磁化强度的场行为。研究了van Vleck反铁磁体的感应磁致伸缩特性，即磁化强度在相变点处具有奇异性。并试图将所得结果与可供参考的实验数据进行定性比较。
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英文标题：
《Magnetization and Magnetoscrition of van Vleck antiferromagnets with
magnetic anisotropy of "easy-plane" type》
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作者：
V.M. Kalita, I.M. Ivanova and V.M. Loktev
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
The theoretical description of quantum phase transition, induced by the external magnetic field, into antiferromagnetic state in the van Vleck - singlet - magnet with a single-ion anisotropy of "easy-plane" type and ion spin S=1 is proposed. It is shown that the spin polarization of the ground non-degenerated state proves to be the order parameter of such a transition and that the Landau thermodynamic approach can be employed for its (transition) description. The magnetic properties which include the field behavior of the magnetization and magnetic susceptibility of the antiferromagnetic phase in the fields of different directions are studied. The peculiarities of induced magnetostriction in van Vleck antiferromagnet, which as well as magnetization has a singularity in the phase transition point, are investigated. An attempt is made for qualitative comparison of results obtained with avaliable experimental data.
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PDF链接：
https://arxiv.org/pdf/707.4227
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