Structural, magnetic, and magnetotransport studies in bulk Ni55.2Mn18.1Ga26.7 alloy
作者： Babita Ingale , R. Gopalan , V. Chandrasekaran , S. Ram
DOI: 10.1063/1.3066620
关键词: Phase transition 、 Magnon 、 Magnetic refrigeration 、 Condensed matter physics 、 Ferromagnetism 、 Electrical resistivity and conductivity 、 Magnetoresistance 、 Alloy 、 Scattering 、 Materials science 、 General Physics and Astronomy
摘要: Structural, magnetic, and transport properties have been investigated in off-stochiometric bulk Ni55.2Mn18.1Ga26.7 alloy. The alloy undergoes an austenite-martensite phase transition ferromagnetic state at 264 K. temperature field dependence of electrical resistivity studies revealed that the electron-electron scattering is dominant determining below 80 K, while higher temperatures (80–300 K), electron-magnon as well electron-phonon dominate. A negative magnetoresistance value 7% maximum near TC (∼283 K) 7 T has obtained Also a magnetocaloric (ΔSM) −1.3 J/kg K observed around
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