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:
Jan. 10, 2012
Filed:
Oct. 17, 2008
Sang-koog Kim, Seoul, KR;
Ki-suk Lee, Seoul, KR;
Young-sang Yu, Seoul, KR;
SNU R&DB Foundation, Seoul, KR;
Abstract
Provided are a method for read-out of information in a magnetic recording element and a method for read-out of information in a magnetic random access memory. In the method, a magnetic recording element including a magnetic free layer where a magnetic vortex is formed is prepared, and '0' or '1' is assigned according to a core orientation of a magnetic vortex formed in the magnetic free layer. The magnetic vortex core formed in the magnetic free layer rotates on the magnetic free layer by applying a current or magnetic field, of which a direction varies with time, to the magnetic free layer with the magnetic vortex formed. “0” or “1” assigned according to the core orientation of the magnetic vortex formed in the magnetic free layer is read out by measuring a characteristic caused by a difference in a rotation radius of the magnetic vortex core. Herein, the rotation radius of the magnetic vortex core, which is formed in the magnetic free layer and rotates by the applied current or magnetic field, varies with the core orientation of the magnetic vortex formed in the magnetic free layer.