Antiferromagnetic anisotropy determination by spin Hall magnetoresistance

Antiferromagnetic anisotropy determination by spin Hall magnetoresistance
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通过自旋霍尔磁阻测定反铁磁各向异性

DOI:
10.1063/1.4986372
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发表时间:
2017-08
影响因子:
3.2
通讯作者:
Jin Xiaofeng
Jin Xiaofeng
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wang Hua;Hou Dazhi;Qiu Zhiyong;Kikkawa Takashi;Saitoh Eiji;Jin Xiaofeng

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提出了一种测量反铁磁绝缘体磁各向异性的电学方法。当具有强自旋-轨道相互作用的金属膜,例如,铂(Pt)沉积在AFI上,由于自旋霍尔磁阻(SMR),其电阻应受到AFI N单元矢量方向的影响。因此,受外部磁场和磁各向异性两者影响的AFI N eel矢量的方向反映在Pt的电阻中。考虑SMR,计算了Pt电阻与AFI的磁场角度关系,表明在强磁场中通过监测Pt电阻可以实验获得反铁磁各向异性。针对Pt/Cr2 O3、Pt/NiO和Pt/CoO等现实系统进行了计算。
An electric method for measuring magnetic anisotropy in antiferromagnetic insulators (AFIs) is proposed. When a metallic film with strong spin-orbit interactions, e.g., platinum (Pt), is deposited on an AFI, its resistance should be affected by the direction of the AFI N eel vector due to the spin Hall magnetoresistance (SMR). Accordingly, the direction of the AFI N eel vector, which is affected by both the external magnetic field and the magnetic anisotropy, is reflected in resistance of Pt. The magnetic field angle dependence of the resistance of Pt on AFI is calculated by consider- ing the SMR, which indicates that the antiferromagnetic anisotropy can be obtained experimentally by monitoring the Pt resistance in strong magnetic fields. Calculations are performed for realistic systems such as Pt/Cr2O3, Pt/NiO, and Pt/CoO.
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