Magnetostructural transitions and adiabatic temperature variation in polycrystal and single-crystal Ni2MnGa alloys

The magnetocaloric response of off-stoichiometric Ni2MnGa polycrystal and single-crystal samples with a Curie temperature coincident with the martensitic transition temperature was investigated. The direct measurement of temperature change (ΔTad) during an adiabatic transformation under a maximum fi...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2006-04, Vol.99 (8)
Main Authors: Sasso, C. P., Pasquale, M., Giudici, L., Besseghini, S., Villa, E., Lewis, L. H., Lograsso, T. A., Schlagel, D L.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The magnetocaloric response of off-stoichiometric Ni2MnGa polycrystal and single-crystal samples with a Curie temperature coincident with the martensitic transition temperature was investigated. The direct measurement of temperature change (ΔTad) during an adiabatic transformation under a maximum field variation ΔH=5.6×106A∕m (7T) was performed. The polycrystalline sample shows a maximum ΔTad≈1.5K at a temperature close to the structural transition. The value of ΔTad and the 20K span of the ΔTad peak encourage further studies of the effect of microstructure on the magnetocaloric response of Ni2MnGa.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2162335