Magnetism and transport properties of Hf1−xTaxFe2 and Mn2−xCrxSb
Magnetism and transport properties of Hf1−xTaxFe2 and Mn2−xCrxSb
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DOI：
10.1016/s0925-8388(99)00269-8
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发表时间：
1999-11
影响因子：
6.2
通讯作者：
Y. Nagata;Toshiharu Hagii;S. Yashiro;H. Samata;S. Abe
中科院分区：
文献类型：
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作者：
Y. Nagata;Toshiharu Hagii;S. Yashiro;H. Samata;S. Abe
研究了Hf 1 − xTaxFe 2（0.1≤x≤0.2）和Mn 2 −xCrxSb（x=0.1）的磁性和输运性质。Hf 1-xTaxFe 2（x>0.15）在150至350 K之间发生从铁磁性到反铁磁性的连续磁转变，并且该转变对输运性质有相当大的影响。特别是，与x=0.155的样品显示出在室温附近的变磁转变，并观察到一个显着的磁阻高达12%，根据变磁转变。Mn1.9Cr0.1Sb在300 K左右发生了从反铁磁性到亚铁磁性的一级磁转变，在300 K时也发生了场致磁转变，并且这种转变强烈地影响了输运性质.在20 kOe的外加磁场下，在300 K左右观察到高达30%的巨磁电阻效应。变磁转变似乎通过s-d散射产生巨磁电阻。
The magnetism and transport properties of Hf1−xTaxFe2(0.1≤x≤0.2) and Mn2−xCrxSb (x=0.1) were studied. Hf1−xTaxFe2(x>0.15) has a successive magnetic transition from ferromagnetism to paramagnetism via antiferromagnetism at temperatures between 150 and 350 K, and the transition has a considerable effect on the transport property. In particular, a specimen with x=0.155 shows a metamagnetic transition near room temperature, and a significant magnetoresistance as large as 12% is observed in accordance with the metamagnetic transition. Mn1.9Cr0.1Sb, which has a first-order magnetic transition from antiferromagnetism to ferrimagnetism at about 300 K, also shows a field-induced magnetic transition at 300 K, and the transition strongly affects the transport property. A giant magnetoresistance as large as 30% was observed at about 300 K under an applied field of 20 kOe. The metamagnetic transition seems to give rise to giant magnetoresistance via s–d scattering.