Anisotropy and Inversion in Permalloy Films
| Autor: | E. E. Huber, M. S. Cohen, G. P. Weiss, D. O. Smith |
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| Rok vydání: | 1960 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 31:S295-S297 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.1984707 |
| Popis: | A phenomenological model of field-induced and oblique-incidence anisotropy in Permalloy films is proposed. It is assumed that the field-induced structure does not introduce any local spatial dispersion in the macroscopic magnetization M; the opposite is assumed for oblique-incidence structure. In addition it is assumed that the oblique-incidence dispersion is anisotropic, being least when M is perpendicular to the depositing beam.Support for the model comes from anisotropies, found for oblique-incidence films only, in the following measurements: resonance line width, transmission of polarized light, and resistivity. A primary success of the model is the prediction of a correlation between anisotropy and inversion (Hw/Hk>1). Inverted films can be made by crossing the field-induced and oblique-incidence anisotropies at 90°. Such films exhibit a “locked” state in which opposite rotation of M in local regions occurs; this implies centers of spatial dispersion and provides the connection with oblique-incidence... |
| Databáze: | OpenAIRE |
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