Evidence for transient superconductivity near 260 K

Ayyub, P. ; Guptasarma, P. ; Rajarajan, A. K. ; Gupta, L. C. ; Vijayaraghavan, R. ; Multani, M. S. (1987) Evidence for transient superconductivity near 260 K Journal of Physics C: Solid State Physics, 20 (26). L673-L676. ISSN 0022-3719

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Official URL: http://iopscience.iop.org/0022-3719/20/26/007?from...

Related URL: http://dx.doi.org/10.1088/0022-3719/20/26/007


Four-probe DC measurements in a sample of X-ray single phase ErBa2Cu3O7−x have revealed a large drop in the resistivity to near-zero values at a temperature as high as 260 K. The high-temperature anomaly disappeared on the third thermal cycle and the sample superconducted at the 'normal' critical temperature of 90 K. This indicates that the high-temperature resistive anomaly probably originates from a granular minority phase.

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