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Compatible microstructures in magnetic materials
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DOI：10.1103/PhysRevMaterials.6.074402.png)
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摘要
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A mathematical relationship between magnetic material constants is proposed for which highly reversible microstructures form during phase transformations. The microstructures formed during paramagnetic-to-ferromagnetic phase transformation are systematically studied, and specific combinations of material constants-namely, magnetocrystalline anisotropy k(1), k(2) and magnetostriction lambda(100), lambda(111)-for which stress-free interfaces with divergence-free magnetization can form are identified. The microstructural analysis shows that magnetic materials with k(1) <= 0, k(2) >= 9 vertical bar k(1)vertical bar/4, and lambda(111) = lambda(100)/3 form exactly compatible and divergence-free phase boundaries. Furthermore, the analysis shows that, consistent with experimental observation, magnetic alloys that undergo cubic-to-monoclinic-II transformation have multiple solutions satisfying the high-reversibility condition and are suitable candidates for alloy development. Broadly, the results could guide the design of magnetic materials with low fatigue and hysteresis for energy applications.
Keyword:
PHASE
MAGNETOSTRICTION
TRANSFORMATION
HYSTERESIS
BARRIERS
ALLOY
期刊
IF:
3.4
论文数:
5.2K
被引数:
1.7W
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