Abstract
Detailed investigations of extended x-ray absorption fine structure (EXAFS)associated with the K-edges of Mn and Co have been carried out forLaMn1−xCoxO3 ± δ (0.3≤x≤1)compounds. It is found that the local structure around Mn is different from that around Co. The distortionin MnO6 octahedra decreases with the increasing Co content whereasCoO6 octahedra are undistorted over the entire range ofx. The Co–O bond length has been found to decrease with the increase inx. Based on the information about the first shell, the structural anomalies observed in thesecompounds have been discussed. Complementary information obtained from the XRD andEXAFS studies have been used to explain the behaviour of resistivity in these compounds.
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