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PREISACH-NÉEL TYPE MODEL FOR NANOSTRUCTURED MAGNETIC MATERIALS

A. Sava1,* , A. Stancu1

Affiliation

  1. “Alexandru Ioan Cuza” University, Faculty of Physics, Department of Electricity and Physical Electronics, 11, Carol I Blvd., Iasi, 700506, Romania

Abstract

In this paper we present a new Preisach-Néel type model that can be successfully applied to simulate magnetisation processes of nanostructured magnetic materials. Taking into account the results of micromagnetic simulations, this model uses a Preisach distribution of interaction fields obtained by superposition of two Gaussian distributions. The amplitudes of the two distributions are dependent on the total magnetic moment of the sample. Therefore, we can take into account, in a very simple manner, state dependent interaction field distributions. The model was used to simulate temperature dependent magnetisation processes like the Zero Field Cooled (ZFC). The results show the ZFC dependence on the statistical and mean field interactions..

Keywords

Preisach-Néel model, Thermal activation, Interparticle interactions.

Submitted at: April 21, 2004
Accepted at: June 22, 2004

Citation

A. Sava, A. Stancu, PREISACH-NÉEL TYPE MODEL FOR NANOSTRUCTURED MAGNETIC MATERIALS, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 3, pp. 1001-1004 (2004)