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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.:

US 10847292 B1

PDFFull Text
Date of Patent:
Nov. 24, 2020

Filed:

Aug. 06, 2018

Soft magnetic alloy and magnetic device

Applicant:

Tdk Corporation, Tokyo, JP;

Inventors:

Kazuhiro Yoshidome, Tokyo, JP;

Akito Hasegawa, Tokyo, JP;

Hiroyuki Matsumoto, Tokyo, JP;

Kenji Horino, Tokyo, JP;

Akihiro Harada, Tokyo, JP;

Syota Goto, Tokyo, JP;

Isao Nakahata, Tokyo, JP;

Assignee:

TDK CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C22C 38/02 (2006.01); H01F 1/153 (2006.01); C22C 38/32 (2006.01); C22C 38/26 (2006.01); C22C 38/00 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/20 (2006.01); C22C 33/02 (2006.01); C22C 38/12 (2006.01); C22C 45/02 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/15333 (2013.01); C22C 33/0257 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/20 (2013.01); C22C 38/26 (2013.01); C22C 38/32 (2013.01); C22C 45/02 (2013.01); H01F 1/15308 (2013.01); C22C 2200/02 (2013.01); C22C 2202/02 (2013.01); H01F 41/0226 (2013.01);
Abstract

A soft magnetic alloy is composed of a Fe-based nanocrystal and an amorphous phase. In the soft magnetic alloy, S2-S1>0 is satisfied, where S1 (at %) denotes an average content rate of Si in the Fe-based nanocrystal and S2 (at %) denotes an average content rate of Si in the amorphous phase. In addition, the soft magnetic alloy has a composition formula of ((Fe)X1X2)MBSiPCrCu)C. X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, S and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, V and W. In the composition formula, a to g, α and β are in specific ranges.

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