Anomalous anisotropic magnetoresistance in single-crystalline Co/SrTiO3(001) heterostructures

doi:10.1088/1674-1056/ac05ad

中国物理B ›› 2021, Vol. 30 ›› Issue (12): 127302-127302.doi: 10.1088/1674-1056/ac05ad

Anomalous anisotropic magnetoresistance in single-crystalline Co/SrTiO₃(001) heterostructures

Shuang-Long Yang(杨双龙), De-Zheng Yang(杨德政), Yu Miao(缪宇), Cun-Xu Gao(高存绪), and De-Sheng Xue(薛德胜)^†

Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China

收稿日期:2021-03-03 修回日期:2021-04-29 接受日期:2021-05-27 出版日期:2021-11-15 发布日期:2021-12-01
通讯作者: De-Sheng Xue E-mail:xueds@lzu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12174163 and 91963201), the Program for Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT-16R35), and the 111 Project, China (Grant No. B20063).

Anomalous anisotropic magnetoresistance in single-crystalline Co/SrTiO₃(001) heterostructures

Shuang-Long Yang(杨双龙), De-Zheng Yang(杨德政), Yu Miao(缪宇), Cun-Xu Gao(高存绪), and De-Sheng Xue(薛德胜)^†

Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China

Received:2021-03-03 Revised:2021-04-29 Accepted:2021-05-27 Online:2021-11-15 Published:2021-12-01
Contact: De-Sheng Xue E-mail:xueds@lzu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12174163 and 91963201), the Program for Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT-16R35), and the 111 Project, China (Grant No. B20063).

摘要/Abstract

摘要： The anisotropic magnetoresistances (AMRs) in single crystalline Co(6 nm)/SrTiO₃(001) heterostructures from 5 K to 300 K with the current direction setting along either Co[100] or Co[110] are investigated in this work. The anomalous (normal) AMR is observed below (above) 100 K. With the current along Co[100] direction, the AMR shows negative longitudinal and positive transverse magnetoresistances at T< 100 K, while the AMR is inverse with the current along Co[110]. Meanwhile, the amplitude ratio between Co[110] and Co[100] is observed to be as large as 29 at 100 K. A crystal symmetry-adapted model of AMR demonstrates that interplay between the non-crystalline component and crossed AMR component results in the anomalous AMR. Our results may reveal more intriguing magneto-transport behaviors of film on SrTiO₃ or other perovskite oxides.

关键词: single crystalline, anisotropic magnetoresistance, heterostructure

Abstract: The anisotropic magnetoresistances (AMRs) in single crystalline Co(6 nm)/SrTiO₃(001) heterostructures from 5 K to 300 K with the current direction setting along either Co[100] or Co[110] are investigated in this work. The anomalous (normal) AMR is observed below (above) 100 K. With the current along Co[100] direction, the AMR shows negative longitudinal and positive transverse magnetoresistances at T< 100 K, while the AMR is inverse with the current along Co[110]. Meanwhile, the amplitude ratio between Co[110] and Co[100] is observed to be as large as 29 at 100 K. A crystal symmetry-adapted model of AMR demonstrates that interplay between the non-crystalline component and crossed AMR component results in the anomalous AMR. Our results may reveal more intriguing magneto-transport behaviors of film on SrTiO₃ or other perovskite oxides.

Key words: single crystalline, anisotropic magnetoresistance, heterostructure

中图分类号: (Magnetoresistance)

73.43.Qt

73.50.-h (Electronic transport phenomena in thin films) 75.47.-m (Magnetotransport phenomena; materials for magnetotransport) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)

Shuang-Long Yang(杨双龙), De-Zheng Yang(杨德政), Yu Miao(缪宇), Cun-Xu Gao(高存绪), and De-Sheng Xue(薛德胜). Anomalous anisotropic magnetoresistance in single-crystalline Co/SrTiO₃(001) heterostructures[J]. 中国物理B, 2021, 30(12): 127302-127302.

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Anomalous anisotropic magnetoresistance in single-crystalline Co/SrTiO₃(001) heterostructures

Anomalous anisotropic magnetoresistance in single-crystalline Co/SrTiO₃(001) heterostructures

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