Chin. Phys. Lett.  2018, Vol. 35 Issue (8): 087501    DOI: 10.1088/0256-307X/35/8/087501
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Tunneling Anisotropic Magnetoresistance in $L1_{0}$-MnGa Based Antiferromagnetic Perpendicular Tunnel Junction
Xu-Peng Zhao1,2, Da-Hai Wei1,2, Jun Lu1,2, Si-Wei Mao1,2, Zhi-Feng Yu1,2, Jian-Hua Zhao1,2**
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
2College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049
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Xu-Peng Zhao, Da-Hai Wei, Jun Lu et al  2018 Chin. Phys. Lett. 35 087501
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Abstract We report on the tunneling anisotropic magnetoresistance in antiferromagnetic perpendicular tunnel junction consisting of $L1_{0}$-MnGa/FeMn/AlO$_{x}$/Pt grown on GaAs (001) substrates by molecular-beam epitaxy. The temperature-dependent perpendicular exchange bias effect reveals an exchange coupling between ferromagnetic $L1_{0}$-MnGa and antiferromagnetic FeMn. The rotation of antiferromagnetic spins in FeMn can be driven by perpendicularly magnetized $L1_{0}$-MnGa due to the exchange-spring effect at the interface and leads to room-temperature tunneling anisotropic magnetoresistance ratio of 0.86%. We also find that the tunneling anisotropic magnetoresistance strongly depends on temperature and angle. These results have broadened the material selection range for high performance antiferromagnetic spintronic devices.
Received: 11 April 2018      Published: 15 July 2018
PACS:  75.50.Ee (Antiferromagnetics)  
  75.30.Et (Exchange and superexchange interactions)  
  75.50.Vv (High coercivity materials)  
  75.47.-m (Magnetotransport phenomena; materials for magnetotransport)  
  81.15.Hi (Molecular, atomic, ion, and chemical beam epitaxy)  
Fund: Supported by the National Basic Research Program of China under Grant No 2015CB921500, the National Natural Science Foundation of China under Grant Nos 61334006 and 11774339, the Key Research Project of Frontier Science of the Chinese Academy of Sciences under Grant No QYZDY-SSW-JSC015, and the Key Research Program of the Chinese Academy of Sciences under Grant No XDPB08-2.
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https://cpl.iphy.ac.cn/10.1088/0256-307X/35/8/087501       OR      https://cpl.iphy.ac.cn/Y2018/V35/I8/087501
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Xu-Peng Zhao
Da-Hai Wei
Jun Lu
Si-Wei Mao
Zhi-Feng Yu
Jian-Hua Zhao
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