2018年10月24日，博士研究生苟峻铭同学的论文“Ferromagnetic composite with stress-insensitive magnetic permeability: Compensation of stress induced anisotropies” 被Physical Review Materials 录用。祝贺他！

论文摘要：

Single-phase ferromagnets show deterioration of magnetic permeability when operating under a pre-stress due to the stress-induced anisotropy, which is a serious restriction for soft magnets. However, technologically, it is highly desired that soft magnets can maintain stable permeability under high stress. Here we report that a ferromagnetic Fe-Ga composite exhibits nearly unchanged magnetic permeability and coercivity even when subjected to compressive pre-stress as high as 200 MPa. Such stress-insensitive magnetic properties stem from the compensation of stress-induced anisotropies between the two ferromagnetic components with opposite magnetostriction signs (&lambda; > 0 for the BCC phase and &lambda; < 0 for the FCC phase). The magnetomechanical measurements and phase field simulations revealed that the stress-induced domain switching pathways are competitive between the BCC and the FCC phases, ruling out the pre-stress influence on magnetization. The present finding may provide a general recipe for designing soft magnets with stable magnetic properties under high stress.