Magnetic devices with enhanced poles
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United States of America Patent
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Nov 3, 1998
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N/A
app pub date -
Nov 4, 1996
filing date -
Feb 6, 1992
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Expired
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Abstract
A process resulting in enhanced pole performance, relative to permalloy poles, in narrow track magnetic devices. A preferred process includes increasing the anisotropy field of the pole material while maintaining an acceptable coercivity level and near zero magnetostriction. One embodiment utilizes a NiCoFe alloy containing 22% cobalt by weight, heat treated in an easy axis magnetic field in a non-oxidizing atmosphere. This process achieves favorable domain structures at narrow pole tip widths.
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