反铁磁性
凝聚态物理
材料科学
自旋电子学
双稳态
磁化
自旋(空气动力学)
薄膜
磁场
光电子学
纳米技术
铁磁性
物理
量子力学
热力学
作者
Chang‐Yang Kuo,Yi‐De Liou,Zhiwei Hu,Sheng‐Chieh Liao,H. M. Tsai,Huang‐Wen Fu,Chih‐Yu Hua,Yi‐Chun Chen,Hong‐Ji Lin,Arata Tanaka,Chien‐Te Chen,Jan‐Chi Yang,C. F. Chang
标识
DOI:10.1002/adma.202200610
摘要
Antiferromagnetic spintronics is an emerging field of non-volatile data storage and information processing. The zero net magnetization and zero stray fields of antiferromagnetic materials eliminate interference between neighbor units, leading to high-density memory integrations. However, this invisible magnetic character at the same time also poses a great challenge in controlling and detecting magnetic states in antiferromagnets. Here, two antiferromagnetic spin states close in energy in strained BiFeO3 thin films at room temperature are discovered. It can be reversibly switched between these two non-volatile antiferromagnetic states by a moderate magnetic field and a non-contact optical approach. Importantly, the conductivity of the areas with each antiferromagnetic textures is drastically different. It is conclusively demonstrated the capability of optical writing and electrical reading of these newly discovered bistable antiferromagnetic states in the BiFeO3 thin films.
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