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Magnetovolume and magnetocaloric effects in Er2Fe17

dc.contributor.authorÁlvarez Alonso, Pablo
dc.contributor.authorGorria, Pedro
dc.contributor.authorBlanco Rodríguez, Jesús Angel
dc.contributor.authorSánchez Marcos, Jorge
dc.contributor.authorCuello, Gabriel J.
dc.contributor.authorPuente Orench, Inés
dc.contributor.authorRodríguez Velamazán, José Alberto
dc.contributor.authorGarbarino, Gastón
dc.contributor.authorDe Pedro, Imanol
dc.contributor.authorRodríguez Fernández, Jesús
dc.contributor.authorSánchez Llamazares, José Luis
dc.contributor.editorAmerican Physical Society
dc.date.accessioned2018-04-03T19:23:26Z
dc.date.available2018-04-03T19:23:26Z
dc.date.issued2012-11
dc.identifier.citationP. Alvarez-Alonso, P. Gorria, JA. Blanco, et al. (2012). Magnetovolume and magnetocaloric effects in Er2Fe17. Physical Review B, 86, 184411. ©2012 American Physical Society
dc.identifier.urihttp://hdl.handle.net/11627/3803
dc.description.abstract"Combining different experimental techniques, investigations in hexagonal P6(3)/mmc Er2Fe17 showremarkable magnetovolume anomalies below the Curie temperature, T-C. The spontaneous magnetostriction reaches 1.6 x 10(-2) at 5Kand falls to zero well above T-C, owing to short-range magnetic correlations. Moreover, Er2Fe17 exhibits direct and inverse magnetocaloric effects (MCE) with moderate isothermal magnetic entropy Delta S-M, and adiabatic temperature Delta T-ad changes [Delta S-M similar to -4.7 J(kgK)(-1) and Delta T-ad similar to 2.5 K near the T-C, and Delta S-M similar to 1.3 J(kgK)(-1) and Delta T-ad similar to -0.6 K at 40 K for Delta H = 80 kOe, respectively, determined from magnetization measurements]. The existence of an inverse MCE seems to be related to a crystalline electric field-level crossover in the Er sublattice and the ferrimagnetic arrangement between the magnetic moments of the Er and Fe sublattice. The main trends found experimentally for the temperature dependence of Delta S-M and Delta T-ad as well as for the atomic magnetic moments are qualitatively well described considering a mean-field Hamiltonian that incorporates both crystalline electric field and exchange interactions. Delta S-M (T) and Delta T-ad(T) curves are essentially zero at similar to 150 K, the temperature where the transition from direct to inverse MCE occurs. A possible interplay between the MCE and the magnetovolume anomalies is also discussed."
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.classificationFÍSICA
dc.titleMagnetovolume and magnetocaloric effects in Er2Fe17
dc.typearticle
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.86.184411
dc.rights.accessAcceso Abierto


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