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:
Jul. 19, 2016
Filed:
Apr. 25, 2014
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/057 (2006.01); H01F 10/12 (2006.01);
U.S. Cl.
CPC ...
H01F 1/057 (2013.01); H01F 10/126 (2013.01);
Abstract
The present invention provides such a permanent magnet that its magnetic properties will not significantly decrease and it can be prepared at a lower temperature, compared to conventional R-T-B based permanent magnets. In the R-T-B based structure, a stacked structure of R1-T-B based crystal layer and Ce-T-B based crystal layer can be formed by alternatively stacking the R1-T-B based crystal layer and the Ce-T-B based crystal layer. In this way, a high magnetic anisotropy field of the R1-T-B based crystal layer can be maintained while the crystallization temperature can be lowered by the Ce-T-B based crystal layer.