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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 10650849 B1

PDFFull Text
Date of Patent:
May. 12, 2020

Filed:

Feb. 11, 2019

Magnetoresistive element having exchange-coupled film including ptcr/xmn antiferromagnetic bilayer

Applicant:

Alps Alpine Co., Ltd., Ota-ku, Tokyo, JP;

Inventors:

Masamichi Saito, Niigata-ken, JP;

Fumihito Koike, Niigata-ken, JP;

Hiroaki Endo, Niigata-ken, JP;

Assignee:

ALPS ALPINE CO., LTD., Tokyo, JP;

Attorney:

Hunton Andrews Kurth LLP

Primary Examiner:

Craig A Renner

Int. Cl.
CPC ...
G11B 5/39 (2006.01); H01L 43/12 (2006.01); H01L 43/08 (2006.01); G01R 33/09 (2006.01); H01F 10/12 (2006.01); H01L 43/10 (2006.01);
U.S. Cl.
CPC ...
G11B 5/3906 (2013.01); G01R 33/09 (2013.01); G11B 5/3945 (2013.01); H01F 10/12 (2013.01); H01L 43/08 (2013.01); H01L 43/10 (2013.01); H01L 43/12 (2013.01); G11B 2005/3996 (2013.01);
Abstract

An exchange-coupled film according to the present invention includes an antiferromagnetic layer, pinned magnetic layer, and free magnetic layer which are stacked. The antiferromagnetic layer is composed of a Pt—Cr sublayer and an X—Mn sublayer (where X is Pt or Ir). The X—Mn sublayer is in contact with the pinned magnetic layer. The Pt—Cr sublayer has a composition represented by the formula PtCr(α is 44 at % to 58 at %) when the X—Mn sublayer is placed on the Pt—Cr sublayer or has a composition represented by the formula PtCr(α is 44 at % to 57 at %) when the X—Mn sublayer is placed on the pinned magnetic layer.

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