The electronic structure and spin polarization of Co 2 Mn 0.75 (Gd, Eu) 0.25 Z (Z=Si, Ge, Ga, Al) quaternary Heusler alloys

The electronic structure and spin polarization of Co 2 Mn 0.75 (Gd, Eu) 0.25 Z (Z=Si, Ge, Ga, Al) quaternary Heusler alloys
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Co 2 Mn 0.75 (Gd, Eu) 0.25 Z (Z=Si, Ge, Ga, Al)四元Heusler合金的电子结构和自旋极化

DOI:
10.1016/j.jmmm.2015.10.101
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Saadi Berri
Saadi Berri
中科院分区:
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文献类型:
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作者:
Saadi Berri

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采用第一性原理方法研究了Co2 Mn 0.75(Gd,Eu)0.25Z(Z=Si,Ge,Ga,Al)四元Heusler合金的电磁性质.研究工作采用(FP-LAPW)方法,其中交换关联势是在GGA-WC框架下计算的。在室温条件下,我们的能带结构计算结果表明,Co_2Mn_(0.75)(Gd,Eu)_(0.25)Z(Z=Si,Ge)具有半金属(HM)能带结构,在费米能级上显示出100%的自旋极化。而Co_2 Mn_(0.75)(Gd,Eu)_(0.25)Z(Z=Ga,Al)合金则是金属性的。最后,在这一系列的某些结构中发现的半金属化合物可能在自旋电子器件中有用。
A first-principles approach is used to study the electronic and magnetic properties of Co2Mn0.75(Gd, Eu)0.25Z(Z=Si, Ge, Ga, Al) quaternary Heusler alloys. The investigation was done using the (FP-LAPW) method where the exchange-correlation potential was calculated with the frame of GGA-WC. At ambient conditions our calculated results of band structures reveal that for Co2Mn0.75(Gd, Eu)0.25Z(Z=Si, Ge) has a half-metallic (HM) band structure profile showing 100% spin polarization at the Fermi level. In contrast, Co2Mn0.75(Gd, Eu)0.25Z(Z=Ga, Al) alloys are found to be metallic. Finally, the half metallic compounds found in some structures of this series might be useful in spintronic devices.
DOI: 10.1103/physrevb.71.144416
发表时间: 2005-04-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Wang, WH;Przybylski, M;Kirschner, J
通讯作者: Kirschner, J