Magnetic phase diagram, critical behavior, and two-dimensional to three-dimensional crossover in the triangular lattice antiferromagnet RbFe"MoO4…2
Magnetic phase diagram, critical behavior, and two-dimensional to three-dimensional crossover in the triangular lattice antiferromagnet RbFe"MoO4…2
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三角晶格反铁磁体 RbFe"MoO4…2 中的磁相图、临界行为以及二维到三维交叉
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发表时间：
2006
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通讯作者：
L. N. Demianets
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作者：
L. Svistov;A. Smirnov;L. A. Prozorova;O. Petrenko;A. Micheler;N. Büttgen;A. Shapiro;L. N. Demianets
我们研究了准二维(准2D)海森堡反铁磁体RbFe(MoO4)(2)的磁学和热力学性质以及核磁共振谱。观测到的有序参数、临界指数和整个磁性H-T相图的温度依赖关系都与二维XY模型的理论预测相一致。低温下比热随温度的变化表现出从二维反铁磁体的T(2)定律到三维T(3)定律的交叉。(C)2006年美国物理研究所。
We have studied the magnetic and thermodynamic properties as well as the NMR spectra of the quasi-two-dimensional (quasi-2D) Heisenberg antiferromagnet RbFe(MoO4)(2). The observed temperature dependence of the order parameter, the critical indices, and the overall magnetic H-T phase diagram are all in a good agreement with the theoretical predictions for a 2D XY model. The temperature dependence of the specific heat at low temperature demonstrates a crossover from a T (2) law characteristic of a two-dimensional antiferromagnet to a three-dimensional T (3) law. (c) 2006 American Institute of Physics.