Ferromagnetic composite with stress-insensitive magnetic permeability: compensation of stress induced anisotropies
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Ferromagnetic composite with stress-insensitive magnetic permeability: compensation of stress induced anisotropies
- 发表刊物：
- Physical Review Materials
- 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 (λ > 0 for the BCC phase and λ < 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.
- 合写作者：
- J.M. Gou, X.L. Liu, C.S. Zhang, Y.N. Shi, T.Y. Ma*, X.B. Ren et al.
- 是否译文：
- 否
- 发表时间：
- 2018-10-23