Caloric and Multicaloric Effects in Shape Memory Alloys

Caloric properties rely on the reversible thermal response of a given material to changes induced by an applied field. In magnetic shape-memory materials, thanks to a strong interplay between magnetism and structure, caloric effects can be induced by application of both magnetic and mechanical (stre...

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Bibliographic Details
Published inMaterials today : proceedings Vol. 2; pp. S477 - S484
Main Authors Planes, A., Stern-Taulats, E., Castán, T., Vives, E., Mañosa, L., Saxena, A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2015
Subjects
Heusler
Magnetic shape memory alloys
magnetocaloric effect
martensitic transition
multicaloric effects
martensitic transition
magnetocaloric effect
Magnetic shape memory alloys
Heusler
multicaloric effects
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Summary:Caloric properties rely on the reversible thermal response of a given material to changes induced by an applied field. In magnetic shape-memory materials, thanks to a strong interplay between magnetism and structure, caloric effects can be induced by application of both magnetic and mechanical (stress) fields. The study of such effects is an expanding field of research opening novel opportunities in solid state refrigeration and energy harvesting applications. In this paper we present an overview of the present state of the art of the subject. After a brief discussion of the thermodynamics of systems with magneto-structural interplay, we survey the caloric and multicaloric properties of NiMn-based Heusler materials. The conditions required for optimal caloric efficiency in cycling processes are considered. Finally, we outline some present challenges and future perspectives in this topic.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2015.07.332