A magnetic sensor and a current sensor

Japanese Patent JP6282990

B2

PROBLEM TO BE SOLVED: To provide a magnetic sensor including a magnetoresistance effect element of which the sensitivity is unlikely to reduce even if preserved for a long time under a high temperature environment, and a current sensor employing the magnetic sensor.SOLUTION: The magnetic sensor comprises a magnetoresistance effect element 11 having a sensitivity axis in a specific direction. The magnetoresistance effect element has a laminated structure in which a fixed magnetic layer 21 and a free magnetic layer 23 are laminated via a non-magnetic material layer 22, and comprises a first anti-ferromagnetic layer 24 in which an exchange coupling bias is generated between the first anti-ferromagnetic layer and the free magnetic layer and a magnetization direction of the free magnetic layer can be aligned with a predetermined direction in a magnetization variable state. The free magnetic layer includes: a misfit reduction layer 23b which is provided in contact with the first anti-ferromagnetic layer and reduces lattice mismatching of the free magnetic layer to the first anti-ferromagnetic layer; and a ferromagnetic layer formed from a ferromagnetic material 23a provided at an opposite side of the misfit reduction layer at a side opposing the first anti-ferromagnetic layer.SELECTED DRAWING: Figure 2

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Yosuke Ide
Masamichi Saito

JP2015034532A

February 21, 2018

February 24, 2015

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ALPS ELECTRIC CO.,LTD.

H01L43/08; G01R15/20; G01R33/09; H01L43/10

JP2005109240A
JP2012134481A
JP2000306219A

Katsuyuki Okubo
野▲崎▼ 照夫
Masahiro Matsushita

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