We report a new reentrant superconducting-normal resistive transition observed in the Sr1-xKxBiO3 superconductor. Unlike the previous reports about the reentrant resistive transition where the superconducting region becomes reduced and finally resumes the normal state by increasing the external magnetic field (H) or the current (7), we observed the recovery of superconductivity induced by applying H or increasing I. Subsequent dc magnetization measurement shows a gradual decrease of the diamagnetic susceptibility - appearance of the paramagnetic, Meissner effect - at low fields (H < 50 Oe) in the same temperature range where the reentrant normal resistivity was measured. The sample dependence of the reentrant resistive transition suggests the important role of grain boundaries in our samples. Possible physical origins of the field induced superconductivity observed in Sr1-xKxBiO3 are discussed.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering