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Low temperature study of resistivity of Sm0.6Sr0.4MnO3

Author(s): I.A.Abdel-Latif, M.El-Sherbini

This work is devoted to the study of the octahedral distortion in the Sm0.6Sr0.4MnO3 composite and its influence on the electromagnetic transport (colossal magnetoresistance CMR). Comparison between the MR of Sm0.6Sr0.4MnO3 whichwas prepared in different Laboratories (Cairo University, CU, and Petersburg Nuclear Physics Institute, PNPI) was held. In both it was prepared using the same standard solid state reaction. The lattice parameters are the same in both samples. However, there are differences in MR values.At T = 84.4K,MRmeasured at PNPI is 81.7%atmagnetic field; H = 2.4T whileMRmeasured at CU is 90.7%at magnetic field; H = 2T and 96.4%atH = 3T. The tilt angle ofMO6 octaherda for both samples calculated and has different values. This may lead to deviation in the MR values.

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