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. 03, 2015
Filed:
Dec. 27, 2012
Akihiro Makino, Miyagi, JP;
Akihisa Inoue, Miyagi, JP;
Wei Zhang, Miyagi, JP;
Hisamichi Kimura, Miyagi, JP;
Akihiro Makino, Miyagi, JP;
Akihisa Inoue, Miyagi, JP;
Wei Zhang, Miyagi, JP;
Hisamichi Kimura, Miyagi, JP;
Japan Science and Technology Agency, Saitama, JP;
Abstract
A magnetic recording medium 1 includes a substrate 11; and a metallic glassy layer 12 that is arranged on the substrate 11 and has a plurality of convex portions 12A and concave portions 12B. The metallic glassy layer 12 has a chemical composition represented by any one of the formulae (1) to (3):FePtSiBP(wherein, 20<m≦60 at %, 20<n≦55 at %, 11≦x<19 at %, 0≦y<8 at %, and 0<z<8 at %)  (1);FePt(SiBP)(wherein, 11≦x<19 at %, 0≦y<8 at %, and0 <z<8 at %)  (2); and(FePtSiBP)-M(wherein, 0<X≦6 at %; and M represents an element or a combination of any two or more of the elements selected from Zr, Nb, Ta, Hf, Ti, Mo, W, V, Cr, Mn, Al, Y, Ag,and rare earth elements.)  (3).