Magnetic domain structures and domain walls in iron fine particles
作者： Masayoshi Sato , Yoshihiro Ishii , Hitoshi Nakae
DOI: 10.1063/1.331501
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摘要: In order to estimate the critical particle size lc for a single domain structure, magnetic energy densities of an iron fine are calculated as function various configurations magnetization. It is assumed in this calculation that small wall consists exchange, anisotropy, and stray field energies. found 20 nm with axial ratio n = 1, increases increase n, 60 10. The be much larger than bulk material owing energy. Due energy, magnetization configuration circular spins , it becomes flux closure by four domains 900 if 1 600
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