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On the correct estimation of the magnetic entropy change across the magneto-structural transition from the Maxwell relation: study of MnCoGeBx alloy ribbons

dc.contributor.authorQuintana Nedelcos, Aris
dc.contributor.authorSánchez Llamazares, José Luis
dc.contributor.authorSánchez Valdés, Cesar Fidel
dc.contributor.authorÁlvarez Alonso, Pablo
dc.contributor.authorGorria, Pedro
dc.contributor.authorShamba, Precious
dc.contributor.authorMorley, Nicola
dc.date.accessioned2019-08-09T22:22:44Z
dc.date.available2019-08-09T22:22:44Z
dc.date.issued2017
dc.identifier.citationA. Quintana-Nedelcos, J.L. Sánchez Llamazares, C.F. Sánchez-Valdés, P. Álvarez Alonso, P. Gorria, P. Shamba, N.A. Morley, On the correct estimation of the magnetic entropy change across the magneto-structural transition from the Maxwell relation: Study of MnCoGeBx alloy ribbons, Journal of Alloys and Compounds, Volume 694, 2017, Pages 1189-1195.
dc.identifier.urihttp://hdl.handle.net/11627/5034
dc.description.abstract"An accurate calculation of the different magnetocaloric-related magnitudes derived from the temperature dependence of the magnetic entropy change in materials exhibiting first-order magnetocaloric effect is imperative to correctly estimate the true potential of a specific material for refrigeration purposes. In this contribution, we present a meticulous study of two different thermal procedures to measure the set of isothermal magnetization curves from which the total field induced magnetic entropy change, ?ST, is calculated using the adequate Maxwell relation. If the accurate determination of ?ST for any temperature is pursued the thermal and magnetic history of the materials must be taken into account, and then, the unidirectional measurement of reversible isothermal magnetization curves after a thermal cycle is required. The analysis was conducted on MnCoGeB0.01 alloy ribbons that show a giant ?ST at the coupled magneto-structural transition, from a ferromagnetic (TiNiSi-type) phase to a paramagnetic (NiIn2-type) one, owing to the concomitant abrupt magnetization change. We suggest that the conclusions reached can be applicable to any other system displaying magnetocaloric effect originated at a first-order phase transition."
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectFirst order magnetocaloric effect
dc.subjectMaxwell relation applicability
dc.subjectMagnetic entropy change
dc.subjectRefrigerant capacity
dc.subjectMnCoGeBx alloys
dc.subject.classificationQUÍMICA
dc.titleOn the correct estimation of the magnetic entropy change across the magneto-structural transition from the Maxwell relation: study of MnCoGeBx alloy ribbons
dc.typearticle
dc.identifier.doihttps://doi.org/10.1016/j.jallcom.2016.10.116
dc.rights.accessAcceso Abierto


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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