| Issue |
EPL
Volume 89, Number 6, March 2010
|
|
|---|---|---|
| Article Number | 67004 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/89/67004 | |
| Published online | 13 April 2010 | |
A non-linear dissipative model of magnetism
1
Laboratoire de Chimie et Physique Quantiques, IRSAMC, Université de Toulouse et CNRS 31062 Toulouse cedex 4, France, EU
2
J. Heyrovský Institute of Physical Chemistry of the ASCR, v.v.i. - Dolejškova 3, CZ-182 23 Praha 8, Czech Republic, EU
Corresponding author: ivana.paidarova@jh-inst.cas.cz
Received:
14
October
2009
Accepted:
9
March
2010
A new non-linear dissipative model of magnetism based on the laws of statistical physics is presented. The linear response theory is extended to pass from a quasi-static dynamics to the actual dynamics. The non-equilibrium dissipative dynamics explicitly takes into account the relaxation phenomena as well as the jumps over the energy barriers. The approach provides kinetic equations analogous to the phenomenological laws of transport appearing in the extended thermodynamics. The model holds from molecular magnets possessing plateaus to bulk magnetic materials. An energetic and entropic analysis along the lines initiated by Jaynes and Prigogine provides a deeper understanding of the non-equilibrium thermodynamics.
PACS: 75.10.-b – General theory and models of magnetic ordering / 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© EPLA, 2010
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