Journal of the Magnetics Society of Japan
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
Perpendicular Recording
Effects of Annealing on the Magnetic Properties of Co-Cr Alloy Films
T. Keitoku, J. Ariake, N. Honda, K. Ouchi
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Keywords: annealing effect, Co-Cr alloy film, Ti under-layer, interdiffusion, perpendicular coercivity, perpendicular squareness
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1997 Volume 21 Issue 4_2 Pages 289-292

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Abstract
The effects of annealing (1 hour) on the magnetic properties of Co-Cr-M (M=Au, Pt, Nb, Ta) alloy films with Ti underlayers were studied. All the films exhibited an increase in perpendicular coercivity and perpendicular squareness, resulting in high coercivities of more than 2500 Oe and a high perpendicular squareness of 0.6. The saturation magnetization decreased drastically with annealing temperatures above 400°C because of interdiffusion between Co and Ti. An MFM image of a sample annealed at 600°C showed a fine magnetic domain structure.
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© 1997 by The Magnetics Society of Japan
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