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Magnetocaloric Effect in Ni-Mn-Ga and Ni-Co-Mn-In Heusler Alloys

Published online by Cambridge University Press:  31 January 2011

Vasiliy Buchelnikov ,
Sergey Taskaev ,
Mikhail Drobosyuk ,
Vladimir Sokolovskiy ,
Viktor Koledov ,
Vladimir Khovaylo ,
Vladimir Shavrov  and
Alexander Fediy
Vasiliy Buchelnikov
Affiliation:
buche@csu.ru, Chelyabinsk State University, Chelyabinsk, Russian Federation
Sergey Taskaev
Affiliation:
tsv@csu.ru, Chelyabinsk State University, Chelyabinsk, Russian Federation
Mikhail Drobosyuk
Affiliation:
m.syuk@mail.ru, Chelyabinsk State University, Chelyabinsk, Russian Federation
Vladimir Sokolovskiy
Affiliation:
vsokolovsky84@mail.ru, Chelyabinsk State University, Chelyabinsk, Russian Federation
Viktor Koledov
Affiliation:
koledov@cplire.ru, Institute of Radioengineering and Electronics of RAS, Moscow, Russian Federation
Vladimir Khovaylo
Affiliation:
khovaylo@gmail.com, National University of Science and Technology “MISiS”, Moscow, Russian Federation
Vladimir Shavrov
Affiliation:
shavrov@cplire.ru, Institute of Radioengineering and Electronics of RAS, Moscow, Russian Federation
Alexander Fediy
Affiliation:
afediy@csu.ru, Chelyabinsk State University, Chelyabinsk, Russian Federation
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Abstract

The positive magnetocaloric effect (MCE) in the vicinity of the Curie point in Ni2+xMn1-xGa (x=0.33, 0.36, 0.39) Heusler alloys and the negative and positive MCE near the metamagnetostructural (MMS) transition and the Curie point, respectively, in Ni45Co5Mn36.5In13.5 Heusler alloy has been measured by a direct method. For the magnetic field change ΔH = 2 T, the maximal adiabatic temperature change ΔTad at the Curie point in Ni2+xMn1-xGa alloys is larger than 0.6 K. For Ni45Co5Mn36.5In13.5 alloy, the maximal value of ΔTad = 1.68 K (for the same magnetic field change, ΔH = 2 T) is observed at the MMS phase transition temperature.

Keywords

alloyferromagneticmagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1200: Symposium G – Magnetic Shape Memory Alloys , 2009 , 1200-G07-03
Copyright
Copyright © Materials Research Society 2010

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