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Large magnetic-field-induced strains in Ni2MnGa single crystals

Applied Physics Letters · 1996 · Vol. 69(13) · pp. 1966–1968

K. Ullakko✉(Massachusetts Institute of Technology)Junjie Huang(Massachusetts Institute of Technology)C. Kantner(Massachusetts Institute of Technology)R. C. O’Handley(Massachusetts Institute of Technology)V. V. Kokorin(G.V. Kurdyumov Institute for Metal Physics)

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Abstract

Strains of nearly 0.2% have been induced along [001] in unstressed crystals of Ni2MnGa with magnetic fields of 8 kOe applied at 265 K. These stains are associated with the superelastic motion of twin boundaries in the martensitic phase that is stable below about 274 K.

Shape Memory Alloy Transformations Intermetallics and Advanced Alloy Properties Metal and Thin Film MechanicsMaterials scienceMagnetic shape-memory alloyMartensiteCondensed matter physicsMagnetic fieldCrystal twinningFerromagnetismPseudoelasticityIron alloysPhase (matter)

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Magnetic and magnetomechanical properties of Ni2MnGa