Abstract
In the ‘electron-doped’ high Tc copper oxides, the combination of chemical substitution and reduction transforms the anti-ferromagnetic parent compounds into metallic superconductors. To study the influence of chemical substitution and resulting suppression of anti-ferromagnetic ordering on the normal state properties, we have measured the temperature dependent Hall coefficient R H (T) and resistivity ρ(T) on as-grown non-superconducting Pr2−xCexCuO4 single crystals. We find that the onset of anti-ferromagnetic order at the Cu sites in the Cu-O2 planes (below T Neel ) and the appearance of a weak induced moment on the rare-earth sites induces corresponding changes in R H (T) and ρ(T). Suppression of anti-ferromagnetic order is necessary but not sufficient for inducing superconductivity.
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