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. 24, 2020
Filed:
Apr. 06, 2017
Applicant:
Commissariat a L'energie Atomique ET Aux Energies Alternatives, Paris, FR;
Inventors:
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/047 (2006.01); G01R 33/038 (2006.01); H01F 41/02 (2006.01); H01F 10/16 (2006.01); H01F 10/30 (2006.01); H01F 10/00 (2006.01); G01R 33/00 (2006.01); H01F 10/14 (2006.01);
U.S. Cl.
CPC ...
H01F 1/047 (2013.01); G01R 33/0052 (2013.01); G01R 33/038 (2013.01); H01F 10/002 (2013.01); H01F 10/14 (2013.01); H01F 10/16 (2013.01); H01F 10/30 (2013.01); H01F 41/0253 (2013.01);
Abstract
A permanent magnet includes a stack of N patterns stacked immediately one above the other in a stacking direction, each pattern including an antiferromagnetic layer made of antiferromagnetic material, a ferromagnetic layer made of ferromagnetic material, the directions of magnetization of the various ferromagnetic layers of all the patterns all being identical to one another. At least one ferromagnetic layer includes a first sub-layer made of CoFeB whose thickness is greater than 0.05 nm, and a second sub-layer made of a ferromagnetic material different from CoFeB and whose thickness is greater than the thickness of the first sub-layer.