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A PREISACH-NÉEL MODEL WITH THERMAL VARIABLE VARIANCE: SENSIBILITY TO THE PARAMETERS

I. D. Borcia1, L. Spinu2, Al. Stancu1,*

Affiliation

  1. Faculty of Physics, Al. I. Cuza University, Iasi 6600, Romania
  2. Advanced Materials Research Institute, University of New Orleans, 2000 Lakeshore drive, New Orleans, LA 70148 USA

Abstract

We performed simulations of magnetization curves in field, remnant and also with variable temperature. The simulations were done using a Preisach-Néel model for nanoparticulate media. The model includes the reversible and the irreversible part of the magnetization. There are taken into account the variations of the Preisach distribution due to the mean field and to the thermals effects as well as the movements of the thermal boundary in processes with variable field and temperature. Because the identification problem is a very important point in our simulations, the study of the model sensibility to the parameters can allow for choosing a better identification procedure. In the paper the variation of the magnetization curves with parameters values is analyzed..

Keywords

Preisach-Néel model, Simulation, Magnetization curves.

Submitted at: Aug. 1, 2002
Accepted at: March 12, 2003

Citation

I. D. Borcia, L. Spinu, Al. Stancu, A PREISACH-NÉEL MODEL WITH THERMAL VARIABLE VARIANCE: SENSIBILITY TO THE PARAMETERS, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 1, pp. 355-358 (2003)