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Abstract
The effect of torsional stresses on the directcurrentinduced asymmetric giant magnetoimped� ance in an amorphous microwire with negative magnetostriction has been theoretically studied. The appear� ance of asymmetry in the dependence of the impedance on the external magnetic field is related to the inter� action of a circular field of the direct current and a helicoidal anisotropy of the wire that is induced by the applied torsional stresses. It is established that torsional stresses significantly influence a threshold value of the currentgenerated bias field, above which a hysteres is in the dependence of the impedance on the external field disappears. The obtained results can be used for the creation of weak magneticfield sensors.
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