Permalloy multilayers to reduce the effects of uniaxial anisotropy

J. Wieberdink, C.J.M. Eijkel

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Abstract

The anisotropic magnetoresistance effect of Permalloy (Ni0.82 Fe0.18) is used in a contactless angle detector. The uniaxial magnetic anisotropy in a Permalloy thin film causes a difference between the direction of magnetization and the magnetic field direction. This leads to a systematic error in the angle detector output. The effects of uniaxial magnetic anisotropy can be reduced by using Permalloy multilayers with different orientations of their anisotropy axes. A double layer with mutually perpendicular anisotropy axes is found to be sufficient for application in an angle detector. The Stoner-Wohlfarth single-domain model is used to describe the systematic error of an angle detector using multilayers
Original languageUndefined
Pages (from-to)4278-4282
JournalIEEE transactions on magnetics
Volume25
Issue number5
DOIs
Publication statusPublished - 1989

Keywords

  • IR-55753

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