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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
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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.

The following article appeared in Journal of Applied Physics 115 (2014): 183902 and may be found at

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.
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American Institute of Physics
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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
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