Nearly ferromagnetic metals AFe4Sb12 (A = Ca, Sr, and Ba)
Nearly ferromagnetic metals AFe4Sb12 (A = Ca, Sr, and Ba)
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DOI：
10.1143/jpsj.74.1382
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发表时间：
2005-05-01
影响因子：
1.7
通讯作者：
Matsumura, M
中科院分区：
文献类型：
--
作者：
Matsuoka, E;Hayashi, K;Matsumura, M
报告了碱土填充方钴矿 AFe(4)Sb(12) (A = Ca、Sr、Ba) 的磁性、输运和热性质。所有三种化合物均在 50K 时表现出最大磁化率和热电势，并且电子比热系数高达 100mJ/molK(2)。电阻率在 70 K 处呈现肩峰，并在 9 K 以下呈现二次温度依赖性。这些特性是近铁磁金属的特征。通过施加磁场抑制Fe 3d 带的铁磁自旋波动表现为50至80K之间的负磁阻。
The magnetic, transport and thermal properties of alkaline-earth-filled skutterudites AFe(4)Sb(12) (A = Ca, Sr, Ba) are reported. All three compounds show maximum magnetic susceptibility and thermopower at 50K and a large electronic specific heat coefficient of 100mJ/molK(2). The electrical resistivity exhibits a shoulder at 70 K and follows quadratic temperature dependence below 9 K. These properties are the characteristics of a nearly ferromagnetic metal. The suppression of ferromagnefic spin fluctuations of the Fe 3d band by applying magnetic fields was manifested as a negative magneto-resistance between 50 and 80K.