The effects related to particle size distribution on the temperature dependence of coercive field and of the ratio between the remanent and saturation magnetization of granular Co/Cu films grown by sequential sputtering, have been studied with magneto-optic Kerr effect measurements in the temperature range 8.5-60 K. We worked out a generalized model that includes also temperature effects related to non-uniform single-domain particle size distribution. The model predictions account excellently for the observed temperature behavior of both coercive field and ratio between the remanent and saturation magnetization. We find that a symmetric particle size distribution (Gaussian) accounts better for the experimental results than an asymmetric one (log-normal).

Particles size distribution and temperature dependence of coercivity and remanence in sputtered Co/Cu granular films

VAVASSORI, Paolo;ANGELI, Ergisto;BISERO, Diego;SPIZZO, Federico;RONCONI, Franco
2002

Abstract

The effects related to particle size distribution on the temperature dependence of coercive field and of the ratio between the remanent and saturation magnetization of granular Co/Cu films grown by sequential sputtering, have been studied with magneto-optic Kerr effect measurements in the temperature range 8.5-60 K. We worked out a generalized model that includes also temperature effects related to non-uniform single-domain particle size distribution. The model predictions account excellently for the observed temperature behavior of both coercive field and ratio between the remanent and saturation magnetization. We find that a symmetric particle size distribution (Gaussian) accounts better for the experimental results than an asymmetric one (log-normal).
2002
Vavassori, Paolo; Angeli, Ergisto; Bisero, Diego; Spizzo, Federico; Ronconi, Franco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1198314
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