Magnetic viscosity effects in Co-alloy thin films with stacking faults

We report magnetic measurements on CoCrPt sputtered thin films with stacking fault densities ranging from 9% to 30%. These FCC-like faults mainly in the HCP Co-alloy grains cause an increase in regions of low coercivity, thus promoting thermally activated magnetisation reversal. Significant differen...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2001-05, Vol.226, p.1633-1635
Main Authors: Laidler, H, Holloway, L
Format: Article
Language:English
Subjects:
Thermal activation
Thin films—sputtered
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Summary:We report magnetic measurements on CoCrPt sputtered thin films with stacking fault densities ranging from 9% to 30%. These FCC-like faults mainly in the HCP Co-alloy grains cause an increase in regions of low coercivity, thus promoting thermally activated magnetisation reversal. Significant differences in magnetic viscosity and switching field distributions were observed. A large increase in activation volume was observed for films with over 20% stacking faults. The reduction in the anisotropy fields by defects allows exchange coupling to dominate the reversal, causing increased thermal activation.
ISSN:0304-8853
DOI:10.1016/S0304-8853(00)01045-3