Giant magnetocaloric effect in the (Mn,Fe)NiSi-system

Shtender, Vitalii (author): Uppsala universitet,Oorganisk kemi,Tillämpad materialvetenskap

Björkman, Torbjörn (author)

Eriksson, Olle, 1960- (author): Uppsala universitet,Oorganisk kemi,Teoretisk magnetism,Experimentell fysik,Analytisk kemi,Fasta tillståndets fysik,Fysik I,Fysik IV,Kondenserade materiens teori (Fysik IV),Materialteori,Institutionen för fysik och astronomi,Fysik III,Fysik V,Materialfysik

Sahlberg, Martin, 1981- (author): Uppsala universitet,Oorganisk kemi,Strukturkemi

Svedlindh, Peter (author): Uppsala universitet,Fasta tillståndets fysik,Ytbioteknik,Institutionen för materialvetenskap,Fysik III,Fysik IV,Fysik V,Strukturkemi,Teoretisk magnetism,Materialvetenskap,Experimentell fysik

(creator_code:org_t)

Related links:: https://doi.org/10.4...; show more...; https://urn.kb.se/re...; https://doi.org/10.4...; show less...

Abstract Subject headings

The search for energy-efficient and environmentally friendly cooling technologies is a key driver for the development of magnetic refrigeration based on the magnetocaloric effect (MCE). This phenomenon arises from the interplay between magnetic and lattice degrees of freedom that is strong in certain materials, leading to a change in temperature upon application or removal of a magnetic field. Here we report on a new material, Mn1−xFexNiSi0.95Al0.05, with an exceptionally large isothermal entropy at room temperature. By combining experimental and theoretical methods we outline the microscopic mechanism behind the large MCE in this material. It is demonstrated that the competition between the Ni2In-type hexagonal phase and the MnNiSi-type orthorhombic phase, that coexist in this system, combined with the distinctly different magnetic properties of these phases, is a key parameter for the functionality of this material for magnetic cooling.

By the author/editor: Ghorai, Sagar; Vieira, Rafael M ...; Shtender, Vitali ...; Delczeg-Czirjak, ...; Herper, Heike C.; Björkman, Torbjö ...; show more...; Simak, Sergei I. ...; Eriksson, Olle, ...; Sahlberg, Martin ...; Svedlindh, Peter; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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