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:
Jun. 08, 2004
Filed:
Apr. 19, 2002
Applicant:
Inventor:
Kari M. Ullakko, Espoo, FI;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 4/120 ; H01L 4/126 ; H01F 1/47 ;
U.S. Cl.
CPC ...
H01L 4/120 ; H01L 4/126 ; H01F 1/47 ;
Abstract
The present invention refers to a method for obtaining shape changes, motion and/or force in a material having a twinned structure. According to the method, a sufficiently high external magnetic field applied to the material reorients the twin structure thereby producing motion/force. The operation is possible if the magnetocrystalline anisotropy energy is higher than or comparable to the energy of the reorientation of the twin structure to produce a certain strain.