Magnetic thin film, production method therefor, evaluation method therefor and magnetic head using it, magnetic recording device and magnetic device
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United States of America Patent
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Jan 11, 2005
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app pub date -
Dec 29, 2000
filing date -
May 31, 2000
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Abstract
A magnetic thin film with a saturation magnetic flux density of 2 T or more and a coercive force of 2 Oe or less for a magnetic pole material of a recording head. The magnetic thin film consists of an iron carbide film that includes a martensite (.alpha.') phase as the principal phase and at least carbon and iron as constituent elements. The iron carbide film preferably consists of a single .alpha.' phase. The iron carbide film has a body-centered tetragonal structure and a c-axis constitutes an axis of hard magnetization and, a c-plane constitutes a plane of easy magnetization. The axis of hard magnetization constitutes a direction which is generally perpendicular to the film surface, and the plane of easy magnetization constitutes a direction which is generally parallel to the film surface.
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