Magnetic and anomalous transport properties in Fe2MnAl

Magnetic and anomalous transport properties in Fe2MnAl
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Fe2MnAl 的磁性和反常输运特性

DOI:
10.1016/j.jallcom.2010.12.070
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发表时间:
2011-02
影响因子:
6.2
通讯作者:
Wu, Guangheng
Wu, Guangheng
中科院分区:
材料科学2区
文献类型:
--
作者:
Liu, Zhuhong;Ma, Xingqiao;Meng, Fanbin;Wu, Guangheng

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研究了快淬薄带Fe2MnAl合金的磁性和反常输运性质。结果表明,该合金在居里温度为150K时呈现铁磁有序结构,在TR = 151K时又出现一次磁转变。结果表明,在低于TR的温度下,铁磁基体上存在反铁磁钉扎效应。在TR以下的电阻急剧上升,这可以从反铁磁散射的角度来理解。在居里温度附近出现电阻最大值和居里温度以上电阻的负温度依赖性与从铁磁性到顺磁性的磁相变有关。本文报道了由非均匀磁散射引起的低温负磁阻效应。
This study investigated the magnetism and anomalous transport properties of the melt-spun ribbon Fe2MnAl alloy. It is found that the alloy exhibits ferromagnetic order with the Curie temperature of ∼150K, followed by another magnetic transition at TR∼51K. It is suggested there is antiferromagnetism pinning effect on the ferromagnetic matrix at the temperature below TR. A steep rise of the resistance below TRhas been observed, which can be understood in terms of antiferromagnetic scattering. An appearance of the resistance maximum near the Curie temperature and the negative temperature dependence of the resistance above Curie temperature are associated with the magnetic phase transition from ferromagnetism to paramagnetism. A negative magnetoresistance at low temperature arising from inhomogeneous magnetic scattering is reported.
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