The theory of the motion of magnetic particles in a viscous Newtonian medium, first outlined by Newman and Yar-brough, has been extended to include both low and high field orientation modes. It is shown that the equations of motion can be solved analytically, i.e., without resort to numerical integration. The results of the analysis are used to predict values for easily measured parameters of recording media, such as the initial remanence ratio and squareness ratio.
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Lissberger et al. (1971) studied this question.
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