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- W2000924418 abstract "The perovskite La0.67Ca0.33Mn0.9757Fe0.03O3 compound has been prepared by sol–gel method. Colossal magnetoresistance and magnetic properties of La0.67Ca0.33Mn0.9757Fe0.03O3 has been studied using X-ray diffraction pattern, Rutherford back-scattering spectroscopy, Mössbauer spectroscopy and vibrating sample magnetometer. Crystalline La0.67Ca0.33Mn0.9757Fe0.03O3 was a cubic perovskite structure with a lattice parameter a0=3.859 Å. Mössbauer spectra of La0.67Ca0.33Mn0.9757Fe0.03O3 have been taken at various temperatures ranging from 4.2 K to room temperature. Analysis of 57Fe Mössbauer spectrum data has considered nearest-neighbor interactions and anisotropic hyperfine field fluctuation. Analysis of 57Fe Mössbauer data in terms of the local configurations of Mn atoms has permitted the influence of the magnetic hyperfine interaction to be monitored. The saturation magnetization of La0.67Ca0.33Mn0.9757Fe0.03O3 is found to be 68 emu/g at 77 K. The Curie temperature, TC, is determined to be 210 K. The temperature dependence of the resistance under zero and 10 kOe applied field shows that a semiconductor–metal transition, TSC–M, occurs at 200 K. The relative magnetoresistance, MR, is about 45%." @default.
- W2000924418 created "2016-06-24" @default.
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- W2000924418 date "2000-06-01" @default.
- W2000924418 modified "2023-10-18" @default.
- W2000924418 title "Mössbauer studies of CMR compound La0.67Ca0.33Mn0.9757Fe0.03O3" @default.
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- W2000924418 doi "https://doi.org/10.1016/s0304-8853(00)00061-5" @default.
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