Sánchez-Alarcos Gómez, VicenteRecarte Callado, VicentePérez de Landazábal Berganzo, José IgnacioCesari, EduardRodríguez Velamazán, José Alberto2017-11-152017-11-1520141099-4300 (Electronic)10.3390/e16052756https://academica-e.unavarra.es/handle/2454/26159The influence of the atomic order on the martensitic transformation entropy change has been studied in a Ni-Mn-In-Co metamagnetic shape memory alloy through the evolution of the transformation temperatures under high-temperature quenching and post-quench annealing thermal treatments. It is confirmed that the entropy change evolves as a consequence of the variations on the degree of L21 atomic order brought by thermal treatments, though, contrary to what occurs in ternary Ni-Mn-In, post-quench aging appears to be the most effective way to modify the transformation entropy in Ni-Mn-In-Co. It is also shown that any entropy change value between around 40 and 5 J/kgK can be achieved in a controllable way for a single alloy under the appropriate aging treatment, thus bringing out the possibility of properly tune the magnetocaloric effect.12 p.application/pdfeng© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license.Ni-Mn-In-CoEntropy changeAtomic orderMartensitic transformationMetamagnetic shape memory alloysinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess