The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2005
Filed:
Nov. 20, 2000
Migaku Takahashi, Sendai-shi, Miyagi-ken, JP;
David Djayaprawira, Miyagi-ken, JP;
Hiroki Shoji, Miyagi-ken, JP;
Migaku Takahashi, Sendai-shi, Miyagi-ken, JP;
David Djayaprawira, Miyagi-ken, JP;
Hiroki Shoji, Miyagi-ken, JP;
Other;
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 (α') phase as the principal phase and at least carbon and iron as constituent elements. The iron carbide film preferably consists of a single α′ 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.