磁性最强的σ相Fe-V化合物的H-T面中的磁性phase diagrams
Magnetic phase diagrams in the H-T plane of the magnetically strongest sigma-phase Fe-V compounds
摘要：
磁化强度测量是在两个σ相样品Fe（100-x）V（x）（x=35.5，34.1）与温度T的关系上进行的，并且在不同幅度的DC磁场中进行。利用三个特征温度设计了H-T平面内的磁相图，证明了磁的重入特性。基态磁态是一种自旋玻璃（SG），它由两个亚相组成：一个具有弱的不可逆性，另一个具有强的不可逆性。在SG状态下重建了两条临界线。这两个都显示出从Gabay-Toulouse行为（低场）到线性和/或准Almeida-Touless行为的交叉。揭示了所施加的磁场对两种样品中SG相的影响的强烈差异。
英文摘要：
Magnetization measurements were performed on two sigma-phase samples of Fe(100-x)V(x) (x=35.5, 34.1) vs. temperature, T, and in DC magnetic field, of various amplitudes. Using three characteristic temperatures, magnetic phase diagrams in the H-T plane have been designed testifying to a re-entrant character of magnetism. The ground magnetic state, a spin glass (SG), was evidenced to be composed of two sub phases: one with a weak irreversibility and the other with a strong irreversibility. Two critical lines were reconstructed within the SG state. Both of them show a crossover from the Gabay-Toulouse behavior (low field) to a linear and/or quasi-Almeida-Touless behavior. A strong difference in the effect of the applied magnetic field on the SG phase in the two samples was revealed.
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