Room temperature magnetocaloric effect in Ni-Mn-In

We have studied the effect of magnetic field on a nonstoichiometric Heusler alloy Ni 50 Mn 35 In 15 that undergoes a martensitic as well as a magnetic transition near room temperature. Temperature dependent magnetization measurements demonstrate the influence of magnetic field on the structural phas...

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Bibliographic Details
Published in:Applied physics letters 2007-12, Vol.91 (24), p.242503-242503-3
Main Authors: Bhobe, P. A., Priolkar, K. R., Nigam, A. K.
Format: Article
Language:English
Subjects:
AUSTENITIC STEELS
ENTROPY
HEUSLER ALLOYS
INDIUM ALLOYS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MARTENSITIC STEELS
MATERIALS SCIENCE
NICKEL ALLOYS
PHASE TRANSFORMATIONS
STOICHIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TERNARY ALLOY SYSTEMS
TRANSITION TEMPERATURE
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Summary:We have studied the effect of magnetic field on a nonstoichiometric Heusler alloy Ni 50 Mn 35 In 15 that undergoes a martensitic as well as a magnetic transition near room temperature. Temperature dependent magnetization measurements demonstrate the influence of magnetic field on the structural phase transition temperature. From the study of magnetization as a function of applied field, we show the occurrence of inverse-magnetocaloric effect associated with this magneto-structural transition. The magnetic entropy change attains a value as high as 25 J ∕ kg K (at 5 T field) at room temperature as the alloy transforms from the austenitic to martensitic phase with a concomitant magnetic ordering.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2823601