高周波キャリア型磁界センサにおける不連続的インピーダンス変化特性の素子長さ依存性

概要

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Variation of non-linear impedance as a function of element length is reported. Non-linear impedance occurs in rectangular strips of thin-film soft magnetic material with a width of tens of microns and with inclined stripe domains. Materials with two different thicknesses fabricated in different conditions were studied, with element lengths ranging from 1000μm to 3000μm. It was found that in all cases the change in the non-linear impedance profile as a function of the external magnetic field had the same dependence on the element length. This phenomenon is explained on the basis of the change in magnetic anisotropy caused by the element shape. The stability of the magnetic field in which non-linear impedance appears was also measured to enable this phenomenon to be used in magnetic field sensors.
2005-07-01