Superconductivity in thin films and powders, and in single crystals of Pr-123 has been found by Blackstead et al. and Zou et al., respectively. Nevertheless, up to now it has never been reported in sintered-policrystalline samples. We have prepared high-quality samples of this material by following a sol-gel method. We characterized the structure of all samples by using XRD and SEM-EDS techniques. Magnetic characterization was performed by measuring the magnetization as a function of the temperature T, and the applied magnetic field H. Measurements were taken in the ranges 2 K <T < 400 K and 0 <H< 5 Tesla. In this work we report by the first time superconductivity in Pr-123 sintered-polycristalline samples, with Tc around 90 K, and Hc1 around 870 Oe.
@article{arxiv.cond-mat/9909086,
title = {Superconductivity in sintered-polycristalline PrBa$_{2}$Cu$_{3}$O$_{7-\delta}$},
author = {F. M. Araujo-Moreira and P. N. Lisboa Filho and S. M. Zanetti and E. R. Leite and W. A. Ortiz},
journal= {arXiv preprint arXiv:cond-mat/9909086},
year = {2007}
}
Comments
LT22 Conference paper; 2 pages, 2 fugures, accepted to be published in Physica B