Exchange bias effect in epitaxial La0.35Sr0.65MnO3/La0.7Sr0.3MnO3 bilayers: Impact of antiferromagnet growth conditions

作     者：Zhao, Xuwen Wong, Hon Fai Liu, Yu Kuai Ng, Sheung Mei Cheng, Wang Fai Mak, Chee Leung Leung, Chi Wah 

作者机构：Hong Kong Polytech Univ Dept Appl Phys Hung Hom Hong Kong Peoples R China 

出 版 物：《VACUUM》 (真空)

年 卷 期：2020年第175卷

页      面：109280-109280页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Hong Kong Research Grants Council, Hong Kong SAR [PolyU 153027/17P] Hong Kong Polytechnic University [1-ZVGH] 

主　　题：Pulsed laser deposition Perovskite oxide thin films Exchange bias effect 

摘      要：Antiferromagnets have shown great potential for replacing ferromagnets in spintronics applications in recent years. In this work, antiferromagnetic La0.35Sr0.65MnO3 (AFM-LSMO) thin films were grown on ultrathin ferromagnetic La0.7Sr0.3MnO3 (FM-LSMO) layer over a wide temperature range. The different AFM-LSMO growth temperatures introduced variation of strain states in the AFM-LSMO layer, changing the AFM-LSMO magnetic properties. Considering the thermally activated switching model of antiferromagnetic grains, the behaviour of AFM-LSMO growth temperature-dependent exchange bias effect are explained. This work demonstrates the modulation of exchange bias effect through the control of AFM-LSMO growth conditions, suggesting possibility to control and probe oxide antiferromagnets via exchange bias coupling.