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Effective anisotropy field in anisotropic nanostructured ferromagnetic materials
Author(s) -
Yao Q.,
Liu W.,
Zhang Z. D.
Publication year - 2009
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.200945003
Subject(s) - magnetocrystalline anisotropy , anisotropy , condensed matter physics , materials science , magnetic anisotropy , ferromagnetism , exchange bias , field (mathematics) , magnetization , coupling (piping) , magnetic field , physics , metallurgy , optics , mathematics , quantum mechanics , pure mathematics
A theoretical model has been set up to investigate analytically the effective anisotropy field of the single‐phase and anisotropic nanostructured ferromagnetic materials with uniaxial magnetocrystalline anisotropy. It is revealed that the effective anisotropy field decreases with the grain alignment by the increased deviation of the magnetization from the easy‐axis in the transition region and the enhanced suppressing effect of the intergrain exchange coupling on the anisotropy. It is suggested that magnetic properties such as the soft magnetic properties could be improved by controlling the crystallographic orientation and the intergrain or interlayer exchange coupling. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)