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:
Aug. 09, 1983
Filed:
Jun. 29, 1981
Applicant:
Inventors:
Norio Ohta, Sayama, JP;
Keikichi Ando, Musashino, JP;
Yuzuru Hosoe, Kokubunji, JP;
Yutaka Sugita, Tokorozawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; B01N / ;
U.S. Cl.
CPC ...
428336 ; 252 6257 ; 252 6259 ; 252 626 ; 428692 ; 428693 ; 428900 ; 428910 ;
Abstract
Herein disclosed is a magnetic garnet film for a magnetic bubble element, in which the temperature changing rate of a bubble collapse field is reduced by Gd and Ga and in which the operating characteristics of the bubbles are improved by La and Lu. The temperature coefficient of the bubble collapse field is -0.24 to 0%/.degree. C., and the operating characteristics are remarkably excellent, therefore, this garnet film is suitable for the small bubbles with a diameter smaller than or equal to 1 .mu.m.