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SYNTHESIS, STRUCTURAL AND MAGNETIC PROPERTIES OF DOUBLE PEROVSKITES Sr2CrWO6
Preview AbstractThe double perovskite (Sr2CrWO6) has been prepared in polycrystalline state by solid state reaction. At room temperature, the crystal structure is cubic (space group: Fm3m) with lattice parameter of 7.8200(2) (Å). Both ρ(H=0) and ρ(H=5T) show a semiconductor-like behavior over the whole temperature range up to 5 K. The highest MR(magnetoresistance) value of 55% (H=5T) was observed at 25 K. The valence state of Cr was determined by the X-ray absorption spectroscopy at Cr-L edge. The results, compared to the standard sample, show that the valence state of Cr is 3+.