Particle Size Distribution and Temperature Dependence of Coercivity and Remanence in Sputtered Co/Cu Granular Films
✍ Scribed by Vavassori, P. ;Angeli, E. ;Bisero, D. ;Spizzo, F. ;Ronconi, F.
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 103 KB
- Volume
- 189
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
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).