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.
(Magnetic properties of thin films, surfaces, and interfaces)
Fund: 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).
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 2021 Chin. Phys. B 30 127302
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