Tunneling Anisotropic Magnetoresistance in L10-MnGa Based Antiferromagnetic Perpendicular Tunnel Junction

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2018,（8）
• 页码范围: 88-92
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/35/8/087501

摘要

We report on the tunneling anisotropic magnetoresistance in antiferromagnetic perpendicular tunnel junction consisting of L10-MnGa/FeMn/AlOx/Pt grown on GaAs (001) substrates by molecular-beam epitaxy.The temperature-dependent perpendicular exchange bias effect reveals an exchange coupling between ferromagnetic L10-MnGa and antiferromagnetic FeMn.The rotation of antiferromagnetic spins in FeMn can be driven by perpendicularly magnetized L10-MnGa due to the exchange-spring effect at the interface and leads to roomtemperature 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.