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:
Jul. 11, 2006
Filed:
Mar. 05, 2003
Kazuyuki Matsumoto, Okayama, JP;
Kimitaka Sato, Okayama, JP;
Takatoshi Fujino, Honjo, JP;
Kenichi Inoue, Okayama, JP;
Kazuyuki Matsumoto, Okayama, JP;
Kimitaka Sato, Okayama, JP;
Takatoshi Fujino, Honjo, JP;
Kenichi Inoue, Okayama, JP;
Dowa Mining Co., Ltd., Tokyo, JP;
Abstract
A magnetic powder for magnetic recording is provided that has improved properties suitable for a magnetic recording medium used with a high-sensitivity read head utilizing an MR device. The magnetic powder is composed of iron-base acicular particles containing Co, Al, R (rare earth elements, including Y) and oxygen within the ranges of Co/Fe=10–50 at. %, dissolved Al/(Fe+Co)=5–50 at. %, R/(Fe+Co)=2–25 at. % and oxygen=not greater than 25 wt %; and the acicular particles have an average major axis length of 25–80 nm and a saturated magnetization σs of 10–130 emu/g,