Sensor element with temperature compensating function, and magnetic sensor and electric power measuring device which use same
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United States of America Patent
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Aug 22, 2017
Grant Date -
Feb 11, 2016
app pub date -
Apr 1, 2014
filing date -
Apr 1, 2013
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Abstract
A magnetoresistance effect type magnetic sensor has a problem in that the increase in the surrounding temperature decreases the magnetic characteristic of a magnetic film itself and thereby decreases the sensitivity of the sensor. A sensor element includes: a magnetic film having magnetoresistance effect; a pair of electrodes for applying an electric current to the magnetic film, the pair of electrodes being opposed across the magnetic film; a longitudinal bias magnetic field addition magnet to generate a first bias magnetic field in an opposing direction of the electrodes; and a lateral bias magnetic field addition magnet to generate a second bias magnetic field in an orthogonal direction to the longitudinal bias magnetic field addition magnet, in which a temperature characteristic of the longitudinal bias magnetic field addition magnet is higher than a temperature characteristic of the lateral bias magnetic field addition magnet.
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