Crystalline dependence of spin transmission in Cr2O3 thin films
Crystalline dependence of spin transmission in Cr2O3 thin films
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DOI：
10.1016/j.jmmm.2019.166362
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发表时间：
2020-05
影响因子：
2.7
通讯作者：
Jingu Qin;D. Hou;Yao Chen;E. Saitoh;Xiaofeng Jin
中科院分区：
文献类型：
--
作者：
Jingu Qin;D. Hou;Yao Chen;E. Saitoh;Xiaofeng Jin
实验研究了不同晶体织构的三氧化二铬薄膜中的自旋传输。在Y3Fe5O12/Cr2O3/Pt三层器件中，利用Y3Fe5O12的自旋泵浦将自旋电流注入到Cr2O3中，并用铂中的反自旋霍尔电压(Vishe)来监测自旋传输。对于(0001)面织构的Cr2O3膜，在奈尔温度以下，V迅速消失。然而，对于(11 2‾0)和(11 2‾3)平面共织构的Cr2 O3，V ishe在Néel温度下有一个宽肩.这种不同的温度依赖关系可以用注入自旋矩方向上不同的Néel矢量取向来解释.
Spin transmission in Cr 2 O 3 films of different crystalline textures is studied experimentally. With Y 3 Fe 5 O 12/Cr 2 O 3/Pt trilayer devices, a spin current is injected into Cr 2 O 3 by spin pumping from Y 3 Fe 5 O 12, and the spin transmission is monitored by the inverse spin Hall voltage (V ISHE) in Pt. For (0001) plane textured Cr 2 O 3 films, V ISHE vanishes quickly below the Néel temperature. However, the V ISHE shows a broad shoulder below the Néel temperature for (11 2‾ 0) and (11 2‾ 3) plane co-textured Cr 2 O 3. Such a difference in the temperature dependence of Cr 2 O 3 can be understood by the different Néel vector orientations with respect to the injected spin moment direction.