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:
Jun. 13, 1989
Filed:
Jun. 15, 1988
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148304 ; 420 83 ; 420416 ; 420435 ; 420581 ; 428928 ;
Abstract
A magneto-optical recording medium comprising a perpendicularly magnetized amorphous film made of an alloy of the formula: (R.sub.1-x M.sub.x).sub.a (Fe.sub.1-y Co.sub.y).sub.100-a, wherein R is at least one of La, Ce, Pr, Nd, Sm, Ho, Er and Yb; M is at least one of Tb, Gd and Dy; 0.ltoreq.x<0.5; 0<y<1; and 10.ltoreq.a.ltoreq.40, is large in the Kerr rotation angle, excellent in coercivity and affords a larger read output-to-noise ratio (C/N).