Magnetic devices with enhanced poles

Details Magnetic devices with enhanced poles Magnetic devices with enhanced poles

G - Physics

11

C

356/199

G11C 11/02 (2006.01) C25D 3/56 (2006.01) G11B 5/31 (2006.01) H01F 41/26 (2006.01)

Patent

CA 2012294

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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