Anomaly in the HTSC system (BiPb)2Sr2Ca2Cu3O10-{\delta} at the temperature 203.7K

TL;DR

This paper reports an EPR line broadening anomaly at 203.7K in a BiPb-based high-temperature superconductor, indicating a transition into the superconducting state above the critical temperature.

Contribution

It identifies a specific temperature anomaly in EPR line broadening linked to the superconducting transition in a BiPb-based HTSC system.

Findings

EPR line broadening occurs at 203.7K.

Anomaly linked to the onset of superconductivity.

Conditions for the anomaly's emergence were determined.

Abstract

Broadening of the electron paramagnetic resonance (EPR) line of the paramagnetic probe decorated on the superconducting system surface was detected at the temperature T>Tc. The source of the anomaly and the conditions of its emergence were revealed. The analysis of the experimental results with taking into account the literature data serves as the basis to consider that the observed broadening of the EPR line of the paramagnetic probe at 203.7K resulted from the transition of the system under study into the superconducting state.