Energetic model of ferromagnetic hysteresis: Isotropic magnetization

2004 ◽  
Vol 96 (5) ◽  
pp. 2753-2767 ◽  
Author(s):  
Hans Hauser
Keyword(s):  
Ferromagnetic Hysteresis ◽  
Energetic Model

scholarly journals Integration of Energetic Model for Ferromagnetic Hysteresis in Finite Volume Method for Electromagnetic Field Calculation

2021 ◽  
Vol 21 (1) ◽  
pp. 23-27
Author(s):  
Ali Hammouche ◽  
Mourad Hamimid ◽  
Abdelkader Kansab ◽  
Bachir Belmadani
Keyword(s):  
Finite Volume ◽  
Control Volume ◽  
Model Parameters ◽  
Magnetic Vector Potential ◽  
Field Calculation ◽  
Control Volume Method ◽  
Ferromagnetic Hysteresis ◽  
Energetic Model ◽  
The Time Domain ◽  
Volume Method

In this article, a coupled algorithm between the control volume method and the hysteresis dynamic energetic model for ferromagnetic hysteresis is presented. To illustrate the dynamic behavior of ferromagnetic materials, the quasi-static model is extended by adding two components to the applied magnetic field “Hedd”, and “Hexc”. The added fields are related to the excess losses and classical eddy losses. Thus, two new supplementary coefficients are added to the model parameters. The determination of those coefficients is attained by measuring the energy density for two distinct frequencies. This model introducing the magnetic induction as an independent variable is presented in order to be directly used in time-stepping finite volume calculations applied to the magnetic vector potential formulation. The calculated results are validated by experiences performed in an Epstein’s frame. To check the effectiveness of this model combined with the control volume method in the time domain, the obtained results are compared with experiments.

Energetic model of ferromagnetic hysteresis

2010 ◽  
Vol 29 (6) ◽  
pp. 1504-1513 ◽  
Author(s):  
P. Fulmek ◽  
P. Haumer ◽  
H. Wegleiter ◽  
B. Schweighofer
Keyword(s):  
Ferromagnetic Hysteresis ◽  
Energetic Model

Energetic model of ferromagnetic hysteresis

1994 ◽  
Vol 75 (5) ◽  
pp. 2584-2597 ◽  
Author(s):  
Hans Hauser
Keyword(s):  
Ferromagnetic Hysteresis ◽  
Energetic Model

Energetic model for an elementary unit of a steam network

2006 ◽  
Vol 1 (3) ◽  
pp. 91-102 ◽  
Author(s):  
Lajos Szakonyi ◽  
Zoltan Sari ◽  
Ildiko Jancskar
Keyword(s):  
Elementary Unit ◽  
Energetic Model

scholarly journals Magnetization of Ultraviolet-Reduced Graphene Oxide Flakes in Composites Based on Polystyrene

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2519
Author(s):  
Alexander N. Ionov ◽  
Mikhail P. Volkov ◽  
Marianna N. Nikolaeva ◽  
Ruslan Y. Smyslov ◽  
Alexander N. Bugrov
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduction Process ◽  
X Ray Diffraction ◽  
Mesoscopic Structure ◽  
Reduced Graphene ◽  
Study Results ◽  
Edge Defects ◽  
Mesoscopic Level ◽  
Ferromagnetic Hysteresis

This work presents our study results of the magnetization of multilayer UV-reduced graphene oxide (UV-rGO), polymer matrix (polystyrene), and a conjugated composite based on them. The mesoscopic structure of the composites synthesized in this work was studied by such methods as X-ray diffraction, SEM, as well as NMR-, IR- and Raman spectroscopy. The magnetization of the composites under investigation and their components was measured using a vibrating-sample magnetometer. It has been shown that the UV-reduction process leads to the formation of many submicron holes distributed inside rGO flakes, which can create edge defects, causing possibly magnetic order in the graphite samples under investigation on the mesoscopic level. This article provides an alternative explanation for the ferromagnetic hysteresis loop in UV-rGO on the base of superconductivity type-II.

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