Local hysteresis variation of Co/Pd nanomultilayers

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 o...

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Veröffentlicht in:Journal of applied physics 2000-05, Vol.87 (9), p.6848-6850
Hauptverfasser: Choe, Sug-Bong, Jang, Hyuk-Jae, Shin, Sung-Chul
Format: Artikel
Sprache:eng
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Zusammenfassung: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 Å Co/11 Å Pd)10 sample showed a smooth variation of the local coercivity, while (2 Å Co/11 Å 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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.372862