Hysteresis modeling of Gd films and AFC thin-film recording media
| Autor: | C.V. Massalas, Andreas Berger, Dimitrios I. Fotiadis, Aphrodite Ktena |
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| Rok vydání: | 2004 |
| Předmět: |
hysteresis modeling
Materials science Condensed matter physics Vector operator business.industry Annealing (metallurgy) shape-memory alloys Multivariate normal distribution Probability density function Condensed Matter Physics Magnetic hysteresis Electronic Optical and Magnetic Materials preisach Superposition principle Optics afc thin films ferromagnets Curve fitting identification Electrical and Electronic Engineering Thin film minor loops business magnetic recording |
| Zdroj: | Physica B: Condensed Matter. 343:101-106 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2003.08.034 |
| Popis: | This paper presents simulations of hysteresis processes in thin film media using ID and 2D Preisach models. In the 2D version, a vector operator and superposition of angularly distributed models are used. The characteristic density of the material being modeled is reconstructed via a curve-fitting least-squares procedure that determines the parameters of a bivariate normal probability function density or a weighed mixture of normal densities based on major loop data only. The models have been identified for several samples of Gd films annealed at various temperatures and AFC thin-film recording media consisting of a hard and a soft phase antiferromagnetically coupled. The major and minor hysteresis loops calculated for all samples are in good agreement with experimental data. (C) 2003 Published by Elsevier B.V. Physica B-Condensed Matter |
| Databáze: | OpenAIRE |
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