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:
Oct. 28, 2014
Filed:
Sep. 26, 2012
National Institute for Materials Science, Ibaraki-ken, JP;
Hiroaki Sukegawa, Ibaraki-ken, JP;
Seiji Mitani, Ibaraki-ken, JP;
Tomohiko Niizeki, Ibaraki-ken, JP;
Tadakatsu Ohkubo, Ibaraki-ken, JP;
Kouichiro Inomata, Ibaraki-ken, JP;
Kazuhiro Hono, Ibaraki-ken, JP;
Masafumi Shirai, Miyagi-ken, JP;
Yoshio Miura, Miyagi-ken, JP;
Kazutaka Abe, Miyagi-ken, JP;
Shingo Muramoto, Miyagi-ken, JP;
National Institute For Materials Science, Ibaraki-Ken, JP;
Abstract
A ferromagnetic tunnel junction structure comprising a first ferromagnetic layer, a second ferromagnetic layer, and a tunnel barrier layer that is interposed between the first ferromagnetic layer and the second ferromagnetic layer, wherein the tunnel barrier layer includes a crystalline non-magnetic material having constituent elements that are similar to those of an crystalline oxide that has spinel structure as a stable phase structure; the non-magnetic material has a cubic structure having a symmetry of space group Fm-3m or F-43m in which atomic arrangement in the spinel structure is disordered; and an effective lattice constant of the cubic structure is substantially half of the lattice constant of the oxide of the spinel structure.