Details

Autor(en) / Beteiligte

• Kuo, Chang‐Yang
• Liou, Yi‐De
• Hu, Zhiwei
• Liao, Sheng‐Chieh
• Tsai, Huang‐Ming
• Fu, Huang‐Wen
• Hua, Chih‐Yu
• Chen, Yi‐Chun
• Lin, Hong‐Ji
• Tanaka, Arata
• Chen, Chien‐Te
• Yang, Jan‐Chi
• Chang, Chun‐Fu

Titel

Photonic‐Crafting of Non‐Volatile and Rewritable Antiferromagnetic Spin Textures with Drastic Difference in Electrical Conductivity

Ist Teil von

• Advanced materials (Weinheim), 2022-05, Vol.34 (20), p.e2200610-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Quelle

Wiley-Blackwell Full Collection

Beschreibungen/Notizen

• 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. Two bistable and reversibly controllable antiferromagnetic states in strained BFO film are discovered. These two non‐volatile antiferromagnetic states are successfully patterned with a non‐contact approach combining both optical and magnetic methods. The written antiferromagnetic pattern is electrically readable with at least 30% signal difference. This work promises an alternative route toward practical applications of antiferromagnetic spintronics.