Evaluation of spin-transfer-torque efficiency using magnetization reversal against a magnetic field: comparison of FeCr with negative spin polarization and NiFe
Evaluation of spin-transfer-torque efficiency using magnetization reversal against a magnetic field: comparison of FeCr with negative spin polarization and NiFe
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DOI：
10.35848/1882-0786/acb310
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发表时间：
2023-01
影响因子：
2.3
通讯作者：
H. Suto;T. Nakatani;N. Asam;H. Iwasaki;Y. Sakuraba
中科院分区：
文献类型：
--
作者：
H. Suto;T. Nakatani;N. Asam;H. Iwasaki;Y. Sakuraba
我们提出并证明了一种实验方法来评估自旋转移矩（STT）的效率在电流垂直于平面的巨磁阻器件，它利用STT诱导的磁化反转对垂直磁场。利用这种方法，我们估算了自旋极化为负的FeCr的STT效率，这在自旋电子学应用中引起了人们的关注。与具有正自旋极化的NiFe相比，FeCr诱导的STT的符号相反，反映了负自旋极化。室温下FeCr的STT效率约为NiFe的一半，50 K时超过NiFe。
We propose and demonstrate an experimental method to evaluate spin-transfer-torque (STT) efficiency in current-perpendicular-to-plane giant magnetoresistance devices, which utilizes STT-induced magnetization reversal against a perpendicular magnetic field. Using this method, we estimated the STT efficiency of FeCr with negative spin polarization, which attracts attention in spintronics applications. In comparison with NiFe with positive spin polarization, the sign of the STT induced by FeCr was opposite, reflecting the negative spin polarization. The STT efficiency of FeCr was approximately half that of NiFe at room temperature and surpassed that of NiFe at 50 K.