Mn3Ga, a compensated ferrimagnet with high Curie temperature and low magnetic moment for spin torque transfer applications
Mn3Ga, a compensated ferrimagnet with high Curie temperature and low magnetic moment for spin torque transfer applications
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DOI：
10.1063/1.2722206
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发表时间：
2007-04-09
影响因子：
4
通讯作者：
Felser, Claudia
中科院分区：
文献类型：
--
作者：
Balke, Benjamin;Fecher, Gerhard H.;Felser, Claudia
本文报道了二元化合物Mn3Ga的电、磁和结构性质。成功地合成并研究了四方相Mn3Ga的DO22相。结果表明，该材料为硬磁性材料，其能积为H(C)xB(R)=52.5kJm(-3)，平均饱和磁化强度约为0.25mU(B)/at。在5K时，饱和磁化强度为亚铁磁性有序，在不同晶位的Mn原子上有部分补偿的力矩。居里温度高于730K时，观察到了开始分解的现象。电子结构计算表明，在费米能区具有近半金属亚铁磁序，自旋极化为88%。(C)2007年美国物理研究所。
This work reports about the electronic, magnetic, and structural properties of the binary compound Mn3Ga. The tetragonal DO22 phase of Mn3Ga was successfully synthesized and investigated. It has been found that the material is hard magnetic with an energy product of H(c)xB(r)=52.5 kJ m(-3) and an average saturation magnetization of about 0.25 mu(B)/at. at 5 K. The saturation magnetization indicates a ferrimagnetic order with partially compensating moments at the Mn atoms on crystallographically different sites. The Curie temperature is above 730 K where the onset of decomposition is observed. The electronic structure calculations indicate a nearly half-metallic ferrimagnetic order with 88% spin polarization at the Fermi energy. (c) 2007 American Institute of Physics.