Jiles Atherton Model in Fitting Hysteresis Curves of Magnetoelastic Materials

Nicusor Cristian Pop¹, Ovidiu Florin Caltun¹, Virgil Vilceanu²

¹“Al. I. Cuza” University, The Faculty of Physics, 700506 Iasi Romania

² Afero Exim srl , Bucharest Romania

e-mail: caltun@uaic.ro

This paper presents a Jiles Atherthon model based soft ware designed in Visual Basic to describe experimental magnetoeleastic histeresis curves of magnetostrictive materials under mechanical stress. The differential equations are numerical solved and the Jiles Atherton models’ parameters are identified with a prescribed accuracy. The magnetostricitve ferrites are characterized by coercive field ranging between 0.1 and 4 kA/m and in this case the accuracy of parameters’ identification is lower than 2%. The amorphous wires are characterized by lower coercive field ranging between ....... and .... and by squared hysteresis loops. In this case the accuracy of Jiles Atherton identification is only 5%. Comparing parameters calculated for different hysteresis curves obtained for different stress applied to the samples the drawbacks of the Jiles Atherton model is identified and discussed. From the theoretical hysteresis curves are deduced the magnetostriction curves and are compared with the experimental ones. Finally is discussed the applicability of the Jiles Atherton model in describing magnetoelastic phenomenon.