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Magnetotransport Of La0.70ca0.3-Xsrxmno3(Ag): A Potential Room Temperature Bolometer And Magnetic Sensor, V P. Awana, Rahul Tripathi, Neeraj Kumar, H Kishan, G V. Bhalla, Rong Zeng, L.S Sharth Chandra, V Ganesan, H U. Habermeier

Australian Institute for Innovative Materials - Papers

Here we report the optimized magnetotransport properties of polycrystalline La_0.70Ca_0.3−xSr_xMnO₃ and their composites with Ag. The optimization was carried out by varying the Sr and Ag contents simultaneously to achieve large temperature coefficient of resistance (TCR) as well as low field magnetoresistance (MR) at room temperature. Sharpest paramagnetic (PM)-ferromagnetic (FM) and insulator-metal (IM) transition is observed in the vicinity of the room temperature (T_C≈300 K ≈T_IM) for the composition La_0.70Ca_0.20Sr_0.10MnO₃:Ag_0.20. Partial substitution of larger Sr²⁺ ions at the …