Skip to main content
Article
Phenomenological modelling of first order phase transitions in magnetic systems
Journal of Applied Physics
  • Yevgen Melikhov, Cardiff University
  • Ravi L. Hadimani, Iowa State University
  • Arun Raghunathan, GE India Technology Center
Document Type
Article
Publication Date
1-1-2014
DOI
10.1063/1.4875678
Abstract

First order phase transitions may occur in several magnetic systems, with two structural phases having different magnetic properties each and a structural transition between them. Here, a novel physics based phenomenological model of such systems is proposed, in which magnetization is represented by the volumetric amounts of ferromagnetism (described by extended Jiles-Atherton theory) and paramagnetism (described by the Curie-Weiss law) in respective phases. An identification procedure to extract material parameters from experimental data is proposed. The proposed phenomenological approach was successfully applied to magnetocaloric Gd5(Six Ge 1−x)4 system and also has the potential to describe the behavior of Griffiths phase magnetic systems.

Comments

The following article appeared in Journal of Applied Physics 115 (2014): 183902 and may be found at http://dx.doi.org/10.1063/1.4875678.

Rights
Copyright (year) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Copyright Owner
American Institute of Physics
Language
en
Date Available
2014-09-09
File Format
application/pdf
Citation Information
Yevgen Melikhov, Ravi L. Hadimani and Arun Raghunathan. "Phenomenological modelling of first order phase transitions in magnetic systems" Journal of Applied Physics Vol. 115 Iss. 18 (2014) p. 183902
Available at: http://works.bepress.com/rlhadimani/12/