bcc-FeRh1-xMx体系的磁性能

IEEE Translation Journal on Magnetics in Japan Pub Date : 1994-11-01 DOI:10.1109/TJMJ.1994.4565981

S. Yuasa;Y. Otani;H. Miyajima;A. Sakuma

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引用次数: 14

摘要

根据反铁磁-铁磁转变温度T0、居里温度、磁化强度和晶格常数之间的相关性，研究了有序bcc-FeRh1-xMx合金（M=Fe、Co、Ni、Pd、Ir和Pt）的磁性能。用3d元素M代替Rh降低了转变温度T0，因为M原子的大磁矩稳定了铁磁性。此外，在FeRh1-xIrx体系中观察到一阶反铁磁顺磁跃迁。这种一阶相变的机制可以通过在基于SCR理论的模型中引入磁体积耦合来从现象学上解释。基于线性化muffin-tin轨道方法的第一主带计算很好地解释了FeRh和FeRh1-xPdx的基态性质。

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Magnetic Properties of bcc FeRh1-xMx Systems

The magnetic properties of ordered bcc FeRh 1-x M x alloys (M=Fe, Co, Ni, Pd, Ir and Pt) were studied, in terms of correlations among the antiferromagnetic-ferromagnetic transition temperature T 0 , Curie temperature, magnetization, and lattice constant. Substitution of the 3d element M for Rh diminishes the transition temperature T 0 , since the large magnetic moment of the M atom stabilizes the ferromagnetism. Moreover, a first-order antiferromagnetic-paramagnetic transition was observed in an FeRh 1-x Ir x system. The mechanism of such first-order phase transitions can be explained phenomenologically by introducing magneto-volume coupling into a model based on the SCR theory. The ground state properties of FeRh and FeRh 1-x Pd x are well explained by first-principle band calculations based on the linearized muffin-tin orbital method.

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IEEE Translation Journal on Magnetics in Japan

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