Title:
EXCHANGE COUPLING FILM, MAGNETORESISTANCE EFFECT ELEMENT IN WHICH SAME IS USED, AND MAGNETIC DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/137558
Kind Code:
A1
Abstract:
The present invention provides an exchange coupling film (10) in which a magnetic field (Hex) is high, the magnetic field being such that the orientation of magnetism of a fixed magnetic layer is reversed, and which has exceptional ferromagnetic field resistance, the exchange coupling film being characterized in that: an anti-ferromagnetic layer 2 and a fixed magnetic layer 3 provided with a strong magnetic layer are laminated; the antiferromagnetic layer 2 has a structure in which an IrMn layer 2a, a first PtMn layer 2b, a PtCr layer 2c and a second PtMn layer 2d are laminated in the stated order; and the IrMn layer 2a contacts the fixed magnetic layer 3. In some cases, the thickness d4 of the second PtMn layer 2d is preferably between 0 Å and 60 Å; in some cases, the thickness d3 of the PtCr layer 2c is preferably greater than or equal to 100 Å; and in some cases, the thickness (d1 + d2 + d3 + d4) of the entire ferromagnetic layer 2 is preferably less than or equal to 200 Å.
Inventors:
SAITO MASAMICHI (JP)
KOIKE FUMIHITO (JP)
KOIKE FUMIHITO (JP)
Application Number:
PCT/JP2019/048560
Publication Date:
July 02, 2020
Filing Date:
December 11, 2019
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
H01L43/08; G01R33/09; H01F10/12; H01L43/10
Domestic Patent References:
| WO2018029883A1 | 2018-02-15 |
Foreign References:
| JP2007299880A | 2007-11-15 | |||
| JP2007049135A | 2007-02-22 | |||
| JP2017157662A | 2017-09-07 | |||
| US20150340598A1 | 2015-11-26 |
Attorney, Agent or Firm:
OKUBO, Katsuyuki (JP)
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