Thin Film Magnetization Reversal by Coherent Rotation
作者:
P. R. Gillette,
K. Oshima,
期刊:
Journal of Applied Physics
(AIP Available online 1958)
卷期:
Volume 29,
issue 10
页码: 1465-1470
ISSN:0021-8979
年代: 1958
DOI:10.1063/1.1722970
出版商: AIP
数据来源: AIP
摘要:
Several theoretical analyses of the process of magnetization reversal in thin films by coherent rotation of the magnetization vector have been published. However, these analyses suffer from the use of questionable assumptions and from a lack of generality. This paper presents results obtained by employing an electronic digital computer to solve differential equations of greater accuracy and generality than those previously used. These results show how the optimum damping factor (which, as defined herein, differs slightly from the critical damping factor), the peak output voltage, and the reversal time vary with the magnitude and direction of a field applied to a thin ferromagnetic film with uniaxial anisotropy. The results for a particular direction of applied field show that the optimum damping factor and the peak voltage increase and the reversal time decreases with increasing magnitude of the field; and that a plot of reciprocal reversal timeversusfield magnitude is a parabola if the damping factor is always equal to its optimum value, but a hyperbola if the damping factor is a constant.
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