Local hysteresis variation of Co/Pd nanomultilayers

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Local coercivity variation of Co/Pd nanomultilayers has been investigated by measuring the polar Kerr hysteresis loops of the local areas of submicron size using a magneto-optic Kerr microscope system. Interestingly, the local coercivity distribution was very sensitive to an increase in the number of repeats: the (2 Angstrom Co/11 Angstrom Pd)(10) sample showed a smooth variation of the local coercivity, while (2 Angstrom Co/11 Angstrom Pd)(18) showed a large fluctuation. Based on the thermally activated relaxation model, we have found that this local coercivity variation had a crucial effect on the contrasting magnetization reversal behavior observed in those samples, wall-motion dominant for the former sample and nucleation dominant for the latter one. (C) 2000 American Institute of Physics. [S0021-8979(00)89108-2].
Publisher
AMER INST PHYSICS
Issue Date
2000-05
Language
English
Article Type
Article; Proceedings Paper
Keywords

MAGNETIZATION REVERSAL; ELECTRON-MICROSCOPY; MULTILAYERS; ANISOTROPY; FILMS

Citation

JOURNAL OF APPLIED PHYSICS, v.87, no.9, pp.6848 - 6850

ISSN
0021-8979
URI
http://hdl.handle.net/10203/13379
Appears in Collection
RIMS Journal Papers
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