The enhancement of anomalous Hall effect by inserting MgO layer in perpendicular anisotropic Pd/Co2MnSi/MgO/Pd films

The enhancement of anomalous Hall effect by inserting MgO layer in perpendicular anisotropic Pd/Co2MnSi/MgO/Pd films
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在垂直各向异性Pd/Co2MnSi/MgO/Pd薄膜中插入MgO层增强反常霍尔效应

DOI:
10.1063/1.5006335
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发表时间:
2018-05
期刊:
影响因子:
1.6
通讯作者:
You CY
You CY
中科院分区:
材料科学4区
文献类型:
--
作者:
Fu H. R.;Ma L.;Tian N.;You C. Y.;Wang K.;You CY

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对垂直磁各向异性Pd/Co2 MnSi(tCMS)/MgO/Pd薄膜的反常霍尔效应(AHE)进行了系统的研究。引入MgO层后,AHE显著增强,这是由于自旋-轨道耦合和界面散射贡献的增强。此外,研究发现,在退火过程中,Co和Mn离子在Co2 MnSi/MgO界面处被还原。退火后,在Co2 MnSi/MgO界面处观察到稳定量的Mn-O键合,这意味着适当的Mn-O键合有利于获得大的AHE。
A systematic study of anomalous Hall effect (AHE) was performed in perpendicular magnetic anisotropic Pd/Co2MnSi(tCMS)/MgO/Pd films. The AHE was significantly intensified by inserting MgO layer, which can be ascribed to the enhancement of spin-orbit coupling and interfacial scattering contribution. Moreover, it was found that the Co and Mn ions were reduced at the interface of Co2MnSi/MgO with annealing process. The stable amount of Mn-O bonding was observed at the Co2MnSi/MgO interface after annealing, implying that the proper Mn-O bonding could be favorable for achieving large AHE.
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