Abstract
Single crystals of quasi one dimensional (1D) magnetic oxides Sr3XPtO6 (X = Ni and Cu) were grown by flux method. In these compounds, X and Pt ions form an alternating and infinite-X-Pt-X-Pt-X-chain along hexagonal c-axis which invokes low dimensional magnetic behaviors added with geometrical frustration. DC resistivity on these samples was measured along perpendicular and parallel to c-axis (chain direction). Both the samples show highly insulating behavior with magnitude of resistivity higher in perpendicular direction. In Ni-sample, although charge transport do not follow any conventional mechanism along perpendicular direction, it has a tendency to follow three dimensional variable range hopping (VRH) model in the low temperature region of the resistivity data measured in parallel direction. For Cu based sample, resistivity along the perpendicular direction can be best described by Arrhenius type of thermally activated behavior. Whereas, in parallel direction, the charge transport is found to be governed by 1D VRH mechanism which is possibly connected to the chain like structural arrangement of this quasi 1D oxide.
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