Is Heusler compound Co2CrAl a half-metallic ferromagnet: Electronic band structure, and transport properties
Is Heusler compound Co2CrAl a half-metallic ferromagnet: Electronic band structure, and transport properties
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DOI：
10.1016/j.jmmm.2003.10.017
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发表时间：
2004-06
影响因子：
2.7
通讯作者：
Ming Zhang;Zhuhong Liu;Hai-ning Hu;Guodong Liu;Yu-ting Cui;Jinglan Chen;Guangheng Wu;Xixiang Zhang;G. Xiao
中科院分区：
文献类型：
--
作者：
Ming Zhang;Zhuhong Liu;Hai-ning Hu;Guodong Liu;Yu-ting Cui;Jinglan Chen;Guangheng Wu;Xixiang Zhang;G. Xiao
本文报道了Heusler化合物Co2 CrAl的电子能带结构和输运性质。能带结构计算表明，Co_2CrAl是一种真正的半金属铁磁体，磁矩为3μ B/公式，在少数自旋带的费米能级附近具有0.475eV的间接带隙。电子电阻率在低温下呈幂律T3.15温度依赖性，归因于非常规的单磁振子散射过程。Co_2CrAl在300 K时的负磁电阻最大值为-0.33%。
We report the electronic band structure, and transport properties of the Heusler compound Co2CrAl. The band structure calculation shows that Co2CrAl is a true half-metallic ferromagnet with a magnetic moment of 3μBper formula, characterized by a full indirect band gap of 0.475eV at around the Fermi level in the minority-spin band. The electronic resistivity shows a power-law T3.15temperature dependence at low temperatures ascribed to the unconventional one-magnon scattering processes. A negative MR maximum of –0.33% is obtained for Co2CrAl at 300K.