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:
Apr. 07, 2026
Filed:
Jul. 19, 2022
Tohoku University, Sendai, JP;
Keito Kobayashi, Sendai, JP;
Shun Kanai, Sendai, JP;
Shunsuke Fukami, Sendai, JP;
Keisuke Hayakawa, Sendai, JP;
Hideo Ohno, Sendai, JP;
TOHOKU UNIVERSITY, Sendai, JP;
Abstract
A superparamagnetic tunnel junction element and a computing system using same, wherein the tunnel junction element has excellent operational stability against an external magnetic field and is suitable for the computing system based on probabilistic computing. The superparamagnetic tunnel junction element includes a first ferromagnetic layer group containing a ferromagnetic material, a second ferromagnetic layer group containing a ferromagnetic material, and a barrier layer disposed between the first ferromagnetic layer group and the second ferromagnetic layer group, wherein the first ferromagnetic layer groupincludes a (1-1)th ferromagnetic layer, a (1-2)th ferromagnetic layer, and a first nonmagnetic coupling layer, the (1-1)th ferromagnetic layer is made of a ferromagnetic material, the magnetization direction thereof changes with a first time constant, the first time constant is one second or shorter, and the first nonmagnetic coupling layer contains at least one of Ru, Ir, Rh, Cr, and Cu.