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:
Dec. 07, 1982
Filed:
Nov. 21, 1979
Applicant:
Inventors:
Norimoto Nouchi, Katano, JP;
Kenji Kanai, Neyagawa, JP;
Nobuyuki Kaminaka, Moriguchi, JP;
Noboru Nomura, Kyoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
427130 ; 427128 ; 4272553 ; 427350 ; 118726 ; 428900 ; 252 6256 ; 252 626 ;
Abstract
A magnetic thin film is composed of an oxide of Fe.sub.x Co.sub.y Cu.sub.z having spinel structure wherein x, y and z represent respective atomic ratios, x+y+z=1, 0.50.ltoreq.x<0.95, 0.05<y.ltoreq.0.30 and 0.ltoreq.z<0.20. Such film exhibits high coercive force and good squareness. The film is made by vapor depositing a material containing at least one of Fe.sub.x Co.sub.y Cu.sub.z alloys and oxides thereof onto a substrate held at a temperature between 200.degree. and 500.degree. C. under an oxygen atmosphere with the pressure of above 10.sup.-4 Torr but below 10.sup.-3 Torr.