Ni-Fe alloy thin films for AMR sensors

Macek, M.; Oblak, Aleksander

doi:10.17222/mit.2016.203

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…Unfortunately, all ferromagnetic materials are subjected to magnetic hysteresis. In high-precision applications, the error caused by hysteresis may be unacceptable, even though it can be significantly reduced by optimizing the material and technology [ 15 , 17 , 18 , 19 ]. Therefore, it must be removed either by design or by software compensation.…”

Section: Introductionmentioning

confidence: 99%

Lagging-Domain Model for Compensation of Hysteresis of xMR Sensors in Positioning Applications

Domajnko¹,

Križaj

2018

Sensors

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The hysteresis of magnetoresistive sensors remains a considerable cause of inaccuracy of positioning applications. The phenomena itself has been well studied and described by different physical and phenomenological models. Various biasing techniques have been proposed. However, the increased fabrication and computational price they require is undesirable. In this paper, a computational algorithm for the compensation of hysteresis of linear and rotary encoders is proposed. A lagging-domain model based on play operators is presented for prediction of hysteresis. The outlined procedure for the calibration of parameters allows the use of the algorithm for various types of encoders without knowing their exact material properties. The method was tested on different anisotropic magnetoresistive and tunneling magnetoresistive sensors. Results show that the impact of hysteresis was reduced by up to 90% without a significant increase of computational time or production costs.

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