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. 01, 2019
Filed:
Apr. 21, 2016
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/00 (2006.01); H01F 1/03 (2006.01); H01F 10/26 (2006.01); H01F 7/02 (2006.01); H01F 10/16 (2006.01); C22C 38/10 (2006.01); H02K 1/02 (2006.01); H01F 1/047 (2006.01); H01F 41/18 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0306 (2013.01); C22C 38/10 (2013.01); C22C 38/105 (2013.01); H01F 7/021 (2013.01); H01F 10/16 (2013.01); H01F 10/265 (2013.01); H02K 1/02 (2013.01); H01F 1/047 (2013.01); H01F 41/18 (2013.01);
Abstract
A permanent magnet having a periodic structure with the concentrations of Fe and T (T is one or more transition metal elements with Co or Ni as necessity) changing alternately, wherein, the concentrations change with a period of 3.3 nm or less and the concentration difference of Fe in the concentration change is 5 at % or more. The permanent magnet has a high saturation magnetization Is and coercivity HcJ and can be prepared even without rare earth element(s) R.