Near room temperature giant magnetocaloric effect and giant negative magnetoresistance in Co, Ga substituted Ni–Mn–In Heusler alloy
Journal of Alloys and Compounds(2016)
摘要
Structural, magnetic, magnetotransport, and magnetocaloric effect of Heusler alloy Ni48.4Co1.9Mn34.2In13.8Ga1.7 have been studied. X-ray diffraction study at different temperatures and magnetothermal measurements performed at different applied magnetic fields reveal a transition from ferromagnetic state to a low magnetization state around 300 K, while the temperature is being decreased, is related to the austenite–martensitic structural transition. Near room temperature giant inverse magnetocaloric entropy change 18 J/kg-K and giant negative magnetoresistance (−66%) for 70 kOe magnetic field change have been observed around the first order magnetostructural transition.
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关键词
Heusler alloy,Arc melting,Martensitic transition,Room temperature inverse magnetocaloric effect,Magnetoresistance,X-ray diffraction
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