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:
Nov. 25, 2014
Filed:
Oct. 19, 2012
Tazumi Nagasawa, Yokohama, JP;
Hirofumi Suto, Tokyo, JP;
Kiwamu Kudo, Kamakura, JP;
Rie Sato, Yokohama, JP;
Koichi Mizushima, Kamakura, JP;
Tao Yang, Yokohama, JP;
Tazumi Nagasawa, Yokohama, JP;
Hirofumi Suto, Tokyo, JP;
Kiwamu Kudo, Kamakura, JP;
Rie Sato, Yokohama, JP;
Koichi Mizushima, Kamakura, JP;
Tao Yang, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A magnetic head according to an embodiment includes: a spin-torque oscillator comprising a first ferromagnetic layer, a second ferromagnetic layer, a third ferromagnetic layer provided on the opposite side of the second ferromagnetic layer from the first ferromagnetic layer, a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, a second nonmagnetic layer provided between the second ferromagnetic layer and the third ferromagnetic layer, a first electrode provided on a surface on the opposite side of the first ferromagnetic layer from the first nonmagnetic layer, and a second electrode provided on a surface on the opposite side of the third ferromagnetic layer from the second nonmagnetic layer. Magnetization precession is induced in each of the first through third ferromagnetic layers when current is applied between the first and second electrodes.