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Article
Magnetostructural transition and magnetocaloric effect in Ni55Mn20Ga25 single crystals
Physical Review B
Document Type
Article
Disciplines
Publication Date
9-29-2005
DOI
10.1103/PhysRevB.72.094435
Abstract
A first order transition from a paramagnetic-austenite phase to a ferromagnetic-martensite phase occurring in off-stoichiometry single crystals of Ni2MnGa at 313 K presents unique features due to the multifunctional character of the magnetic shape memory alloy. A remarkable magnetocaloric effect, associated with an entropy change up to ΔS≈−86 J kg−1 K−1 and an adiabatic temperature change ΔT≈2.2 K, accompanied by mechanical strain Δε⩾3% have been observed in samples subjected to changes of the applied magnetic field ΔH=4×106 A∕m (≈5 T). The effects of magnetic field, temperature, and stress on the entropy variationΔS are quantified and compared.
Copyright Owner
American Physical Society
Copyright Date
2005
Language
en
File Format
application/pdf
Citation Information
M. Pasquale, C. P. Sasso, L. H. Lewis, L. Giudici, et al.. "Magnetostructural transition and magnetocaloric effect in Ni55Mn20Ga25 single crystals" Physical Review B Vol. 72 Iss. 9 (2005) p. 094435 Available at: http://works.bepress.com/thomas_lograsso/86/
This article is from Physical Review B 72 (2005): 094435, doi:10.1103/PhysRevB.72.094435.