Influence of measurement field on the magnetic domains for zero-field cooling exchange bias effect in Ni50Mn37Ga13 alloy

• Published in: Journal of magnetism and magnetic materials Vol. 553; p. 169250
• Main Authors: Zhao, Qizhong, Tian, Fanghua, Ke, Xiaoqin, Wang, Dong, Cao, Kaiyan, Dai, Zhiyong, Fang, Minxia, Zhang, Yin, Zhou, Chao, Yang, Sen, Song, Xiaoping
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2022; Elsevier BV
• Subjects: Antiferromagnetism; Bias; Exchange bias; Ferromagnetism; Magnetic domains; Magnetic materials; Phase-field simulation; Magnetic materials; Phase-field simulation; Exchange bias
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2022.169250

•A ZEB effect of 2900 Oe is obtained in Ni50Mn37Ga13 at 50 kOe measurement field.•Studying the ZEB effect through experimental methods and phase field simulation.•The interface between FM and AFM is largest at the 50 kOe measurement field. The exchange bias effect obtained after zero field cooling (ZEB) not only saves energy but also makes the device easier to control and reduces the size of the device. In this work, the ZEB effect under different measurement fields is obtained in Ni50Mn37Ga13 alloy, further, combining the macroscopic magnetic test and phase field simulation, the microscopic magnetic states under different measurement fields are studied. Through phase field simulation, it is revealed that the density of the ferromagnetic (FM)/antiferromagnetic (AFM) interface first expands and then shrinks with the increase of measurement field, which thus explains the optimum ZEB at an intermediate measurement field. This work reveals the important role of the FM/AFM interface in the ZEB effect.