ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The onset of superconductivity at 140 K has been observed in the high Tc Y-Ba-Cu-O system in samples consisting of 90% by volume of a single-phase oxide of average cation ratio Y:Ba:Cu(approximately-equal-to)1:2:3. A sharp superconducting transition in the resistivity has been measured, where Tc0=140 K, Tc=93.2 K, ΔTc=0.5 K, and "zero resistance'' was observed at 92.0 K. Transmission electron microscopy and energy dispersive spectroscopy measurements revealed that the superconducting phase consisted of a large number of microcrystallites of (approximately-equal-to)0.5 μm size and that these contained a very high defect microtwinned/faulted structure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.98390