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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Magnetic phase transition and magnetocaloric effect in Mn_(5-x)Fe_xSi_3
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Magnetic phase transition and magnetocaloric effect in Mn_(5-x)Fe_xSi_3

机译：Mn_（5-x）Fe_xSi_3中的磁相变和磁热效应

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摘要

The magnetic phase transitions and the magnetocaloric properties of the pseudo binary system Mn_(5-x)Fe_xSi_3 with x=0, 1, 2, 3, 4, 5 have been investigated by measuring the magnetization as a function of temperature and magnetic field. With increasing Fe content, the antiferromagnetic ordering temperature shifts to higher temperatures. The compound Mn_5Si_3 is an antiferromagnet with a field-induced transition. At 4.2 K, the Mn_(5-x)Fe_xSi_3 compounds with x=1 and 2 display antiferromagnetic behavior up to 38 T. For the compounds with x=4 and 5 we find ferromagnetic order. The magnetic-entropy changes in this system are derived from the temperature and field dependence of the magnetization by means of the thermodynamic Maxwell relation. For the MnFe_4Si_3 compound, enhanced but modest magnetic-entropy changes are observed.
机译：通过测量磁化强度随温度和磁场的变化，研究了伪二元体系Mn_（5-x）Fe_xSi_3（x = 0、1、2、3、4、5）的磁相变和磁热性质。随着Fe含量的增加，反铁磁有序温度转变为更高的温度。化合物Mn_5Si_3是具有场感应跃迁的反铁磁体。在4.2 K下，x = 1和2的Mn_（5-x）Fe_xSi_3化合物显示出高达38 T的反铁磁行为。对于x = 4和5的化合物，我们发现铁磁有序。该系统中的磁熵变是通过热力学麦克斯韦关系从磁化的温度和场依赖性得出的。对于MnFe_4Si_3化合物，观察到增强的但适度的磁熵变化。

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