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:
Mar. 02, 1993
Filed:
Jul. 03, 1991
Hiroo Munekata, Mahopac, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and device are disclosed for converting electronic signals into magnetic signals in DMS materials by generating carriers in selected regions of the materials. The carriers comprise either holes or electrons and the concentration of the carriers in the DMS device is electronically and consequently reversibly controlled by varying the voltage supplied to the device. A carrier concentration-induced conversion of the DMS device is obtained in an area defined by an electrode so that the device of a selected area of the device is changed from one magnetic state to another magnetic state. A superexchange interaction through the carriers in the host DMS material causes a transition from one magnetic phase to another when the carrier concentration exceeds a critical value.