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:
Mar. 20, 1984
Filed:
Jun. 30, 1981
Applicant:
Inventors:
Joseph A Aboaf, Peekskill, NY (US);
Erik Klokholm, Stamford, CT (US);
Sigrid R Herd, Pawling, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
420435 ; 148 3157 ; 428606 ; 428928 ; 360134 ; 360135 ; 360136 ;
Abstract
An alloy of Co.sub.x Pt.sub.y with y between 10 and 30 at. % is made by sputtering with H.sub.c >500 Oe and 4.pi.M.sub.s >5000 gauss, and zero magnetostriction. For 10 to 30 at. % Co the sputtered alloy has an H.sub.c of 500-1000 Oe with 4.pi.M.sub.s of 4000-14000 gauss, a magnetostriction passing through zero between 20 and 30 at. % of Pt. For thickness below 1000.ANG. H.sub.c is large (for the above range of alloys) and magnetization is also larger and coercivity varies as a direct function of Pt composition in the alloy up to 30 at. %.