Electronic, structural, and magnetic properties of the half-metallic ferromagnetic quaternary Heusler compounds CoFeMnZ (Z = Al, Ga, Si, Ge)
Electronic, structural, and magnetic properties of the half-metallic ferromagnetic quaternary Heusler compounds CoFeMnZ (Z = Al, Ga, Si, Ge)
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DOI：
10.1103/physrevb.84.224416
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发表时间：
2011-12-19
影响因子：
3.7
通讯作者：
Kobayashi, Keisuke
中科院分区：
文献类型：
--
作者：
Alijani, Vajiheh;Ouardi, Siham;Kobayashi, Keisuke
通过从头算电子结构计算，预测化学计量比为1：1：1：1的四元金属间赫斯勒化合物CoFeMnZ（Z = Al、Ga、Si或Ge）具有半金属铁磁性。采用电弧熔融法合成了化合物，并利用X射线粉末衍射分析了其晶体结构。电子性质进行了研究，使用硬X射线光电子能谱。低温磁矩，从磁化强度测量确定，遵循斯莱特-鲍林规则，确认提出的高自旋极化。所有化合物都具有高居里温度，允许在室温及以上的应用。
The quaternary intermetallic Heusler compounds CoFeMnZ (Z = Al, Ga, Si, or Ge) with 1 : 1 : 1 : 1 stoichiometry were predicted to exhibit half-metallic ferromagnetism by ab initio electronic structure calculations. The compounds were synthesized using an arc-melting technique and the crystal structures were analyzed using x-ray powder diffraction. The electronic properties were investigated using hard x-ray photoelectron spectroscopy. The low-temperature magnetic moments, as determined from magnetization measurements, follow the Slater-Pauling rule, confirming the proposed high spin polarizations. All compounds have high Curie temperatures, allowing for applications at room temperature and above.