Asymmetric Magnetoimpedance in Amorphous Microwires Due to Bias Current Effect of Torsional Stress...
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The influence oftorsionalstressontheasymmetricmagnetoimpedanceinaglass-coatednegativemagnetostrictiveamorphousmicrowireduetobiascurrentisstudiedtheoretically.Thelongitudinalandoff-diagonal impedancecomponentsarefoundassumingasimplified spatialdistributionofthemagnetoelastic anisotropyinducedbythetorsionalstress.Theasymmetryinthe field dependenceofthe impedancecomponentsisattributedtothecombinationofthecircularmagnetic field producedbythe biascurrentandahelicalanisotropyinducedbythetorsionalstress.Theasymmetryinthemagnetoimpedance andthelow-field hysteresisareanalyzedasafunctionofthebiascurrentandtorsional stress.Itisshownthattheapplicationoftorsionalstresssignificantly changesthevalueofthebias currentrequiredtosuppressthehysteresiseffect.Theresultsobtainedmaybeusefulforapplicationsin magnetic-field andstresssensors.