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• W2907197018 abstract "We report on the structural, magnetic and transport properties of Ru doped Ni50−xRuxMn38Sb12 (x = 0, 3 and 4) alloys. The alloys are found to crystallize in orthorhombic phase for x = 0, orthorhombic plus cubic phase for x = 3 and purely cubic for x = 4 respectively, at room temperature. Extended x-ray absorption fine structure (EXAFS) spectroscopy confirms the orthorhombic and cubic structure for x = 0 and 4 respectively while x = 3 shows mixed austenite and martensite phases, at room temperature. Temperature dependent EXAFS data confirms, first order structural transition from cubic austenite phase to orthorhombic martensite phase occurs at 305 and 265 K for x = 3 and 4 respectively, upon cooling. This is in addition to the second order magnetic phase transition at 350, 330 and 326 K for x = 0, 3 and 4 respectively. The change in the magnetic entropy around the martensitic transition is found to be about 19.5 and 12.3 Jkg−1K−1 for x = 3 and 4, while it is 7.0 Jkg−1K−1 for x = 0. These values (for x = 3 and 4) are large when compared to Ni50Mn38Sb12 (7 Jkg−1K−1). Exchange bias field is found to be 383, 362 and 240 Oe at 3 K for x = 0, 3 and 4 respectively. Temperature dependent resistivity of the alloys also confirms the first order phase transition. Magnetoresistance is found to be 9.0% for x = 3, 3.5% for x = 4 and 6.0% for x = 0 respectively near martensite transition. Large resistivity difference between martensitic and austenite phases is due to the difference in the carrier concentration by at least one order. Anomalous Hall contribution ρxyAHE distinguishes martensite and austenite phases." @default.
• W2907197018 created "2019-01-11" @default.
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• W2907197018 date "2019-04-01" @default.
• W2907197018 modified "2023-10-18" @default.
• W2907197018 title "Effect of Ru substitution on structural, magnetic and transport behavior of Ni50Mn38Sb12" @default.
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• W2907197018 doi "https://doi.org/10.1016/j.jallcom.2018.12.343" @default.
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