Document Type

Article

Publication Date

9-29-2005

Journal or Book Title

Physical Review B

Volume

72

Issue

9

First Page

094435

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.

Comments

This article is from Physical Review B 72 (2005): 094435, doi:10.1103/PhysRevB.72.094435.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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