New Heusler compounds with large perpendicular magnetic anisotropy and for spin-torque application

具有大垂直磁各向异性且适用于自旋扭矩应用的新型 Heusler 化合物

• 批准号: 172520571
• 负责人: Professorin Dr. Claudia Felser
• 金额: --
• 依托单位: Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/172520571?language=en
• 关键词: New; Heusler; compounds; large; perpendicular

Goal of this project is the design of new tetragonal half-metallic compounds for spin torque application. Heusler compounds can be designed as low-damping materials, with damping values smaller than for conventional ferromagnetic metals such as CoFe. It is well established that the Co2YZ Heusler compounds are the only theoretical half metallic compounds for which high spin polarisation was realized in tunnel junctions. A reduced saturation magnetization despite a high Curie temperature can be found for ferrimagnetic Heusler compounds such as CoMn2Z and related compounds such as Mn3Ga. However, tetragonal Heusler compounds are of special interest due to their large perpendicular magnetic anisotropy. Especially Heusler compounds with Gallium and Tin show the structural instabilities. Several possible ferro- and ferrimagnetic candidates with tetragonal distortion will be synthesized and investigated within the project such as Mn2FeZ, CoMn2Z, XCr2Z, and XMn2Z.

本计画的目标是设计新型的四金属半金属化合物以应用于自旋力矩。Heusler化合物可以被设计为低阻尼材料，其阻尼值小于常规铁磁金属如CoFe。这是公认的Co2YZ Heusler化合物是唯一的理论上的半金属化合物的高自旋极化实现在隧道结。尽管居里温度高，但对于亚铁磁性Heusler化合物如CoMn2Z和相关化合物如Mn3Ga，可以发现饱和磁化强度降低。然而，四重Heusler化合物由于其大的垂直磁各向异性而特别令人感兴趣。特别是与镓和锡的Heusler化合物显示出结构不稳定性。几个可能的铁磁和亚铁磁候选人与四重畸变将在该项目中合成和研究，如Mn2FeZ，CoMn2Z，XCr2Z和XMn2Z。