Tunable giant magnetocaloric effect with very low hysteresis in Mn^sub 3^CuN^sub 1-x^C^sub x

The structural, magnetic and magnetocaloric properties of the antiperovskite materials Mn3CuN1−xCx have been studied. Substituting N with C increases the temperature of the magnetostructural transition between a paramagnetic cubic high temperature phase and a ferrimagnetic tetragonal low temperature...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 749; p. 926
Main Authors Born, N-O, Caron, L, Seeler, F, Felser, C
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier BV 15.06.2018
Subjects
Ferrimagnetism
Ferrites
Hydrophobic surfaces
Hysteresis
Magnetic properties
Magnetism
Maximum entropy
Nonferrous metals
Phase transitions
Refrigeration
Surface chemistry
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Summary:The structural, magnetic and magnetocaloric properties of the antiperovskite materials Mn3CuN1−xCx have been studied. Substituting N with C increases the temperature of the magnetostructural transition between a paramagnetic cubic high temperature phase and a ferrimagnetic tetragonal low temperature phase. Furthermore, the first order character of the phase transition is retained upon substitution with a hysteresis below 2 K for all compositions. The magnetostructural transition gives rise to giant magnetocaloric effects in a tunable 30 K temperature range with a maximum entropy change of 11.8J/Kkg at a 2 T field change, making these compounds promising for low temperature magnetic refrigeration applications.
ISSN:0925-8388
1873-4669