Journal of Applied Physics · 2012 · 16 citations · 18 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsSolid State PhysicsAlloysMagnetic CharacterizationMagnetic Properties Of SolidsMagnetism In SolidsMagnetocaloric MaterialsMetalsEntropy Change In Magnetic MaterialsHeusler AlloysMagnetic AlloysMagnetic EntropyMagnetic Entropy ChangeMagnetic Refrigeration MaterialsMagnetocaloric EffectNickel-based Alloys
A martensitic Ni50Mn34.5In15.5 Heusler-type alloy doped with Ga was studied by x-ray diffractometry and magnetization measurements. Ga-doping does not affect the austenitic phase transition but shifts the martensitic phase transformation towards room temperature, producing an enhancement of the magnetic entropy change (ΔSM) in that temperature region. Large ΔSM-values in the Ga-doped samples are attained for an applied field of 30 kOe as opposed to the field of 50 kOe commonly found for the un-doped cases. These effects (enhancement of ΔSM-values, shift to temperatures close to 300 K, and large ΔSM-values at lower applied fields) make the Ga-doped Ni50Mn34.5In15.5 Heusler-type alloys good candidates for technological applications as a solid refrigerant.
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Large magnetic-field-induced strains in Ni2MnGa single crystals
K. Ullakko, Junjie Huang, C. Kantner et al. · Applied Physics Letters · 1996 · 2.6K citations
Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In
Thorsten Krenke, E. Duman, M. Acet et al. · Physical Review B · 2007 · 505 citations · Full text