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Thermodynamics of multicaloric effects in multiferroics
- Source :
- Philosophical Magazine. 94:1893-1908
- Publication Year :
- 2014
- Publisher :
- Informa UK Limited, 2014.
-
Abstract
- We provide a general thermodynamic framework to study multicaloric effects in multiferroic materials. This is applied to the case of a magnetoelectric multiferroic such as BiFeO, which is described by means of a Landau free energy with a biquadratic coupling between polarization and magnetization. We obtain a phase diagram, the isothermal entropy change and the adiabatic temperature change across different continuous and first-order phase transitions as the applied electric and magnetic fields are varied. The multicaloric effects are suitably decomposed into the corresponding electrocaloric and magnetocaloric contributions.
Details
- ISSN :
- 14786443 and 14786435
- Volume :
- 94
- Database :
- OpenAIRE
- Journal :
- Philosophical Magazine
- Accession number :
- edsair.doi...........6a919b30b1dcbb85bf7adcbb5c14c02f