Observation of unequal activation volumes of wall-motion and nucleation processes in Co/Pd multilayers

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We report the difference in activation volumes of wall-motion and nucleation processes in Co/Pd multilayers. Each activation volume was estimated from field dependence of wall-motion speed and nucleation rate, obtained by real-time domain imaging using a magneto-optical Kerr effect microscope. Delicate analysis shows that the two activation volumes are generally unequal and the ratio between the volumes varies noticeably from 0.9 to 1.1 with change of the multilayered structure. We found that the inequality in the two activation volumes has a crucial influence on magnetization reversal behavior: a process having a smaller activation volume dominates.
Publisher
AMERICAN PHYSICAL SOC
Issue Date
2001-01
Language
English
Article Type
Article
Keywords

ULTRATHIN FERROMAGNETIC-FILMS; MAGNETIZATION REVERSAL; PERPENDICULAR ANISOTROPY; THIN-FILMS; DYNAMICS; ALLOYS; MODEL

Citation

PHYSICAL REVIEW LETTERS, v.86, no.3, pp.532 - 535

ISSN
0031-9007
URI
http://hdl.handle.net/10203/14060
Appears in Collection
RIMS Journal Papers
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