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:
Feb. 05, 2019
Filed:
Mar. 19, 2015
National Institute for Materials Science, Ibaraki, JP;
Hiroaki Sukegawa, Ibaraki, JP;
Zhenchao Wen, Ibaraki, JP;
Seiji Mitani, Ibaraki, JP;
Koichiro Inomata, Ibaraki, JP;
Takao Furubayashi, Ibaraki, JP;
Jason Paul Hadorn, Ibaraki, JP;
Tadakatsu Ohkubo, Ibaraki, JP;
Kazuhiro Hono, Ibaraki, JP;
Jungwoo Koo, Ibaraki, JP;
NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Ibaraki, JP;
Abstract
Disclosed is a perpendicularly magnetized film structure that uses a highly heat resistant underlayer film on which a cubic or tetragonal perpendicularly magnetized film can grow with high quality, the structure comprising any one substrate () of a cubic single crystal substrate having a (001) plane, or a substrate having a cubic oriented film that grows to have the (001) plane; an underlayer () formed on the substrate () from a thin film of a metal having an hcp structure, such as Ru or Re, in which the [0001] direction of the thin metal film forms an angle in the range of 42° to 54° with respect to the <001> direction or the (001) orientation of the substrate (); and a perpendicularly magnetized layer () located on the metal underlayer () and formed from a cubic material selected from the group consisting of a Co-based Heusler alloy, a cobalt-iron (CoFe) alloy having a bcc structure, and the like, as a constituent material, and grown to have the (001) plane.