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Ferromagnetic Structures in Polycrystalline Films with a Magnetic Field Applied Perpendicular to the Film Plane
Author(s) -
Hothersall D. C.
Publication year - 1969
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.19690340229
Subject(s) - condensed matter physics , perpendicular , magnetic domain , materials science , ferromagnetism , film plane , crystallite , magnetization , thin film , magnetic anisotropy , magnetic field , magnetic force microscope , field (mathematics) , demagnetizing field , optics , physics , geometry , nanotechnology , metallurgy , mathematics , quantum mechanics , pure mathematics
When a ferromagnetic thin film mounted on an electron microscope grid is placed in a magnetic field perpendicular to the grid a change of domain configuration occurs which depends upon the relief of the film. Domain configurations of this type in low anisotropy polycrystalline iron and cobalt films are discussed. The domain boundaries in these conditions are of the “head‐on” type in which the magnetization rotates through 180° in the wall but lies perpendicular to the wall axis on either side of it. A simple analysis of the head‐on structure enables a quantitative estimate of the amount of buckling in a film to be made. The domain structures at the edges of thin films in the applied magnetic field are also considered.