Magnetic domain structures in multilayered NiFe films
作者:
S. R. Herd,
K. Y. Ahn,
期刊:
Journal of Applied Physics
(AIP Available online 1979)
卷期:
Volume 50,
issue B3
页码: 2384-2386
ISSN:0021-8979
年代: 1979
DOI:10.1063/1.326960
出版商: AIP
数据来源: AIP
摘要:
The coercivity of NiFe (80/20) films can be lowered by laminating several layers with nonmagnetic spacers. A reduction by a factor of 10 can be achieved with a simple bi‐layer, regardless of spacer material, provided the spacer thickness is below a critical value. No further reduction is found for multilayers. Two peaks of Hcnear thicknesses of 250A˚ and 1000A˚ for single layer films, associated with changes in domain structure, are suppressed by lamination. After a minimum spacer thickness (S) of 10–15A˚, the domain walls in the separate layers no longer coincide but track closely, their separation depending on S. With S?100A˚ the layers switch independently, giving rise to multiple values of Hc.
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