Abstract
We have fabricated a series of bulk samples of La 2/3− x Tl x Ca 1/3MnO 3− δ (0.0⩽ x⩽0.20) by sol–gel process and studied their magnetization M and magnetic field dependence of resistivity in the temperature range 77⩽ T⩽300 K. The MR properties of these specimens were characterized to be broad, rather than a sharp as in a typical CMR material, which was explained by magnetic inhomogeneity.
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