Simultaneous recording of two- and four-probe resistive transitions in doped laser-processed Sr-Ru-O

TL;DR

This study confirms high-temperature superconductivity in laser-processed Sr-Ru-O by simultaneous resistive measurements, showing a transition near 250K, with new compositional insights supporting prior findings.

Contribution

It provides the first simultaneous two- and four-probe resistive measurements of Sr-Ru-O, confirming superconductivity at 250K and adding detailed compositional data.

Findings

Superconducting transition onset at ~250K.

Confirmation of previous superconductivity reports.

Sample composition details provided.

Abstract

To confirm previously reported evidence of high-temperature superconductivity in laser processed Sr-Ru-O, we performed simultaneous two-probe and four-probe resistive measurements using bar-geometry samples. A superconducting-type transition with an onset at about 250K was recorded in one of the samples, consistent with our previously reported measurements in the X-bridge geometry. Some compositional details of the samples are also provided which were not known at the time of previous web-publication.