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Magnetocaloric Properties of Rapidly Solidified Ni51.1Mn31.2In17.7 Heusler Alloy Ribbons

Published online by Cambridge University Press:  31 January 2011

Jose Sánchez Llamazares ,
Blanca Hernando ,
Víctor Prida ,
Carlos García  and
Caroline Ross
Jose Sánchez Llamazares
Affiliation:
[email protected], Universidad de Oviedo, Fisica, Oviedo, Spain
Blanca Hernando
Affiliation:
[email protected], Universidad de Oviedo, Fisica, Oviedo, Spain
Víctor Prida
Affiliation:
[email protected], Universidad de Oviedo, Fisica, Oviedo, Spain
Carlos García
Affiliation:
[email protected], MIT, Department of Materials Science and Engineering, Cambrige, Massachusetts, United States
Caroline Ross
Affiliation:
[email protected], United States
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Abstract

Magnetic entropy change and refrigerant capacity have been determined for a field change of 20 kOe around the second-order magnetic transition of austenite in as-quenched Ni51.1Mn31.2In17.7 alloy ribbons produced by melt spinning technique. Samples crystallize in a single-phase austenite with the highly ordered L21-type crystal structure and a Curie temperature of 275 K. The material shows a maximum magnetic entropy change of ΔSMmax= - 1.7 Jkg-1K-1, an useful working temperature range of 78 K (δTFWHM) and a refrigerant capacity of RC=132 Jkg-1 (RC= │ΔSMmax│ x δTFWHM). The considerable RC value obtained together with the fabrication via a single-step process make austenitic Ni-Mn-In ribbons of potential interest as magnetic refrigerants for room temperature magnetic refrigeration.

Keywords

rapid solidificationalloymagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1200: Symposium G – Magnetic Shape Memory Alloys , 2009 , 1200-G07-05
Copyright
Copyright © Materials Research Society 2010

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