dc.contributor.author | Álvarez Alonso, Pablo | |
dc.contributor.author | Gorría Korres, Pedro | |
dc.contributor.author | Blanco Rodríguez, Jesús Ángel | |
dc.date.accessioned | 2013-01-30T09:57:01Z | |
dc.date.available | 2013-01-30T09:57:01Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Physical Review B, 84(2), 024412 (2011); doi:10.1103/PhysRevB.84.024412 | eng |
dc.identifier.issn | 1098-0121 | |
dc.identifier.uri | http://hdl.handle.net/10651/6121 | |
dc.description.abstract | A theoretical model including both crystal-field and exchange interactions that considers the effect of magnetic fluctuations is developed to evaluate the temperature dependence of the isothermal magnetic entropy changes in ferromagnetic rare-earth-based intermetallic compounds. The Green’s functions are derived from their equation of motion. The magnetic moment correlation functions are determined beyond the random phase approximation by incorporating a measure of magnetic spontaneous fluctuations in a way that ensures self-consistency with regard to the fluctuation-dissipation theorem. In particular, the exact magnitude of the entropy change without magnetic moment fluctuations depends on the ratio of both the crystal-field first- and the crystal-field third-order magnetic susceptibilities at the Curie temperature, TC. These theoretical predictions are compared with experimental data on cubic RM2 (R = rare earth and M = Al and Ni) compounds, where the principal crystal-field and exchange parameters are well known. | eng |
dc.language.iso | eng | |
dc.publisher | American Physical Society Journals | |
dc.relation.ispartof | Physical Review B | spa |
dc.rights | © American Physical Society (APS) | |
dc.title | Influence of magnetic fluctuations in the magnetocaloric effect on rare-earth intermetallic compounds | eng |
dc.type | journal article | |
dc.identifier.doi | 10.1103/PhysRevB.84.024412 | |
dc.relation.publisherversion | http://dx.doi.org/10.1103/PhysRevB.84.024412 | spa |