Superconductivity in Y-doped (Tl1-xYx)Ba2Ca2Cu3O10-δ

Superconducting Y-doped (Tl1-xYx)Ba2Ca2Cu3O10-delta samples are synthesized by a solid-state reaction method and characterized by X-ray diffraction, DC resistivity (rho), AC susceptibility (chi(ac)) and Fourier transform infrared absorption spectroscopy. The suppression of zero resistivity critical temperature (T-c (R = 0)) and the magnitude of diamagnetism is most likely due to the reduced efficiency with which (Tl1-xYx)Ba2O4-delta charge reservoir layer supplies the carriers to the CuO2 planes. The localization at Y3+ reduces the number of carriers in the CuO2 planes and thereby promotes antiferromagnetism, which is fatal for superconductivity. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.