DEVICE AND METHOD FOR MEASURING MAGNETIC FIELD USING SPIN HALL EFFECT

• Main Authors: RHIE, Kung-Won, KIM, Dong-Seok, JOO, Sung-Jung
• Format: Patent
• Language: English; French; German
• Published: 12.12.2018
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The present invention relates to a device and a method for measuring a magnetic field and, more particularly, to a device and a method for measuring a magnetic field, wherein a spin current is injected into a magnetic body that has magnetic anisotropy using a spin Hall effect occurring in a current applied to a conductor, and the degree of shift of hysteresis in the magnetic body is calculated while reversing the magnetization of the magnetic body by a spin torque such that an external magnetic field applied to the magnetic body can be measured precisely. The present invention provides a magnetic field measuring device for measuring a first magnetic field applied from the outside, the magnetic field measuring device comprising: a current applying means for applying a current to a conductor; a conductor that receives the current from the current applying means and forms a spin current therein; a magnetic body having magnetic anisotropy such that the spin current formed in the magnetic body is injected therein; a magnetic field applying means for applying a second magnetic field to the magnetic body; and a control unit for deriving the degree of shift of hysteresis of the magnetic body following application of the first magnetic field, with regard to the hysteresis of the magnetic body while the first magnetic field has not been applied, and calculating the intensity of the first magnetic field using the same.