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首页> 外文期刊>Physica, B. Condensed Matter >Volume magneto striction at the AF-FRI metamagnetic transition in the itinerant-electron system Mn2-xTxSb (T = Co, Cr)
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Volume magneto striction at the AF-FRI metamagnetic transition in the itinerant-electron system Mn2-xTxSb (T = Co, Cr)

机译：迭代电子系统Mn2-xTxSb（T = Co，Cr）中AF-FRI亚磁跃迁的体积磁致伸缩

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摘要

Mn2Sb is a ferrimagnet, and substitution of Co or Cr for Mn above the critical concentration results in the appearance of a spontaneous first-order magnetic phase transition from ferrimagnetic (FRI) to antiferromagnetic (AF) with decreasing temperature below T-t. At T < T-t a first-order field-induced AF-FRI transition is observed at a critical field B,. The spontaneous as well as the field induced AF-FRI transition is accompanied by a significant magnetovolume effect. Magnetization under high pressure up to 12 kbar, magnetostriction of Mn1.8Co0.2Sb and Mn1.94Cr0.04Sb as well as thermal expansion of the Mn1-xCoxSb system has been measured in order to clarify the origin of the contradictory experimental results on the pressure effect on B-c and that on T-t implying opposite changes. The observed differences are explained by the found anomalous change of sign of the magnetovolume effect at the AF-FRI transition with decreasing temperature. (C) 2004 Elsevier B.V. All rights reserved.
机译：Mn2Sb是亚铁磁体，超过临界浓度的Mn被Co或Cr替代时，会出现自发的一阶磁性相从亚铁磁性（FRI）到反铁磁性（AF）的转变，并且温度降低到T-t以下。在T ＜T-t，在临界场B 1处观察到一阶场诱导的AF-FRI转变。自发的以及场诱导的AF-FRI过渡都伴随着显着的磁烟流效应。测量了在高达12 kbar的高压下的磁化强度，Mn1.8Co0.2Sb和Mn1.94Cr0.04Sb的磁致伸缩以及Mn1-xCoxSb系统的热膨胀，以阐明压力方面相互矛盾的实验结果的由来对Bc和Tt的影响暗示相反的变化。观察到的差异可以通过在AF-FRI过渡处随温度降低而发现的磁烟流效应的符号异常变化来解释。 （C）2004 Elsevier B.V.保留所有权利。

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