Tohoku University

Takuya Funatsu

Hideo Ohno

Shunsuke Fukami

Shun Kanai

William Andrew Borders

Keisuke Hayakawa

A random number generation unit and a computing system using the same, the unit including a magnetic tunnel junction element and being capable of developing the characteristics required for the execution of probabilistic computing and operating at a higher speed. A magnetic tunnel junction element includes a fixed layer having a ferromagnet and having a magnetization direction fixed substantially, a free layer having a ferromagnet and having a magnetization direction varying with a first time constant, and a barrier layer disposed between the layers configured with an insulator. The magnetic tunnel junction element has a shift magnetic field of an absolute value of 20 millitesla or smaller. The fixed layer has a plurality of ferromagnetic and non-magnetic coupling layers laminated one upon another, and ferromagnetic layers adjacent to each other among the respective ferromagnetic layers are coupled in terms of magnetization by the non-magnetic coupling layers in an antiparallel manner.

Growing community of inventors

Sendai, Japan

Takuya Funatsu