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Theoretical domain structure in multidomain magnetite particles
Author(s) -
Argyle Kenneth S.,
Dunlop David J.
Publication year - 1984
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl011i003p00185
Subject(s) - magnetite , domain (mathematical analysis) , single domain , magnetic domain , magnetization , domain wall (magnetism) , condensed matter physics , materials science , particle (ecology) , planar , demagnetizing field , hysteresis , physics , geology , magnetic field , mathematics , computer science , mathematical analysis , oceanography , computer graphics (images) , quantum mechanics , metallurgy
Domain state energy calculations have been made for submicron magnetite cubes, based on a model consisting of planar domains of uniform magnetization separated by 180° domain walls (DWs). The magnetization within a DW is assumed to rotate uniformly, resulting in the appearance of magnetic poles of average density ±(2/π)J s on the particle faces bounding the DWs. Equilibrium domain structure configurations have been determined by minimization of the sum of the demagnetizing and wall energies. Domain structure transition sizes and particle remanences are reported for two‐domain and three‐domain magnetite cubes.