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Origin of Quadrature Flux in Magnetic Films
Author(s) -
Harte K. J.,
Cohen M. S.,
Weiss G. P.,
Smith D. O.
Publication year - 1966
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.19660150121
Subject(s) - magnetization , condensed matter physics , ripple , physics , magnetic flux , quadrature (astronomy) , magnetic field , flux (metallurgy) , perpendicular , anisotropy , nuclear magnetic resonance , optics , materials science , voltage , mathematics , geometry , quantum mechanics , metallurgy
Several investigators have studied flux varying in quadrature with a small ac field applied to a magnetic film in the presence of a perpendicular dc field, i.e., the imaginary part of the susceptibility. This phenomenon has often been interpreted as arising from magnetic switching in scattered regions where the net field crosses the tip of either uniaxial, complex biaxial, or negative anisotropy astroids. The viewpoint taken here, however, is that the quadrature flux originates in local irreversible reorientations of the magnetization ripple. This model is supported by experiments in which quadrature flux was measured as a function of dc field magnitude for three different field configurations chosen so that for a given field value the ripple state was the same in the three configurations.