Abstract
The oxygen content, Hall coefficient and the superconductivity are systematically studied for the Fe‐doped cuprate high‐Tc superconducting YBa2Cu3−xFexOy (x=0, 0.1, 0,2) system. The results show that the oxygen content has great influence on the transport and transfer of carriers, the suppression of superconducting transition temperature Tc caused by Cu(l) site substitution could be weakened by the increase of oxygen content. The carrier density on CuO2 plane plays a key role to the superconductivity. It proves that with the increase of Fe‐doping concentration or the decrease of oxygen content (for a same doping concentration), the effective oxygen vacancy increases, which enhances the ion‐cluster effect and the carrier localization, resulting in the decrease of carrier density that participates in superconducting transport on the CuO2 plane, and accordingly, the decreases of Tc.
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