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Nucleation Field for Three‐Dimensional Rotation in Inhomogeneous Ferromagnets
Author(s) -
Hu Jifan,
Kronmüller H.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221720218
Subject(s) - rotation (mathematics) , nucleation , condensed matter physics , magnetization , ferromagnetism , anisotropy , field (mathematics) , magnetocrystalline anisotropy , magnetic field , physics , magnetic anisotropy , materials science , geometry , optics , mathematics , thermodynamics , quantum mechanics , pure mathematics
Abstract Based on the method developed for the one‐dimensional rotation process the nucleation field for three‐dimensional rotation is deduced from the linearized micromagnetic equation for magnetic inhomogeneities due to a spatial variation of the magnetocrystalline anisotropy energy. Comparing the nucleation field of the one‐dimensional rotation with that of three‐dimensional rotation, it turns out that one‐dimensional rotation describes experimental data of sintered magnets much better than the latter one. The physical process of the nucleation is dominated by the low‐dimensional rotation – especially the one‐dimensional rotation – due to the limited freedom of magnetization state by the alignment of the magnetization within grains and the existence of an easy axis in uniaxial magnets.