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, 2023
Filed:
Feb. 14, 2020
Applicant:
Sony Group Corporation, Tokyo, JP;
Inventors:
Natsuki Ichise, Tokyo, JP;
Masaru Terakawa, Tokyo, JP;
Katsunori Maeshima, Tokyo, JP;
Takashi Kataguchi, Tokyo, JP;
Takeshi Takahashi, Tokyo, JP;
Assignee:
Sony Group Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/706 (2006.01); H01F 1/34 (2006.01);
U.S. Cl.
CPC ...
G11B 5/70678 (2013.01); H01F 1/344 (2013.01);
Abstract
A cobalt ferrite magnetic powder includes magnetic particles that have a uniaxial crystal magnetic anisotropy and contain cobalt ferrite. A peak top 2θ of a (3, 1, 1) plane determined by powder X-ray diffractometry using a CoKα ray is 41.3° or more and 41.5° or less. Some Cos contained in the magnetic particles are substituted with at least one selected from the group consisting of Zn, Ge, and a transition metal element other than Fe.