Surface weak ferromagnet coupling induced giant room-temperature spontaneous exchange bias in antiferromagnet Fe3BO6 polycrystals

• DOI: 10.1063/5.0225163
• Publication Date: 2024-10-15T11:40:21Z
• Authors: Lifeng Wang; Ling Cai; Xiong He; Fanli Yang; Jie Chen; Lizhi Yi; Min Liu; Yunli Xu; Zhengcai Xia; Liqing Pan
• Keywords: Exchange bias

The spontaneous exchange bias effect (SEB) has wide application prospects in information storage technologies. In this study, nanoscale raw materials were used to fabricate antiferromagnetic Fe3BO6 polycrystals. obtained exhibited a large SEB effect, where the value of field at room temperature was as ∼4234 Oe. room-temperature training temperature-dependence, and maximum field-dependence HSEB investigated. We propose that giant originates from exchange-coupling interactions between weak ferromagnetic surface state bulk state. theoretical analysis results further verified by comparing magnetic properties with relatively low crystallinity. investigation will help find promising candidate for devices based on effect.