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:
Nov. 30, 2004
Filed:
Sep. 18, 2002
Satoru Araki, Tokyo, JP;
Koki Takanashi, Sendai-shi, Miyagi 981-0913, JP;
Toshiyuki Shima, Sendai, JP;
Seiji Mitani, Sendai, JP;
Takuto Moriguchi, Sendai, JP;
Other;
Abstract
On a substrate at a temperature of 120 to 240° C., Fe and Pt monatomic layers are alternately laminated. The magnetic multilayer film obtained by such a method has an L1 ordered structure so as to exhibit a high magnetic anisotropy energy constant, a (001) surface parallel to the substrate surface, and a high perpendicular magnetic anisotropy, while its coercive force in a direction perpendicular to the substrate surface and the squareness ratio of its magnetization curve in a direction perpendicular to the substrate surface are large, so that it is usable as a magnetic recording film for a magnetic recording medium and the like. Also, since the magnetic multilayer film is formed while the substrate temperature is 120 to 240° C., the temperature load on the substrate or the like is lowered as compared with conventional making methods in which the substrate temperature is about 500° C.