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:
Sep. 23, 2003
Filed:
Jun. 14, 2002
Yoh Iwasaki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method of modulating magnetic properties of a magnetic film, and new magnetic devices that utilizes the method are set forth. The method works in a multi-layer structure consisting of two layers of low electrical resistivity separated by a spacer layer with higher resistivity, wherein at least one of the layers is magnetic. The modulation of magnetic properties is executed by applying an external voltage to the multi-layer. An electric field induced in the multi-layer by the voltage changes electronic states near the interface between layers, which leads to a modification of either of the following magnetic properties: interface magnetic anisotropy, interface magnetostriction, or inter-layer magnetic coupling. The modulation of the magnetic properties thus performed deflects or rotates magnetization vector in the magnetic film, which is utilized in device applications.