Comparison of water degradation of YBaCuO superconducting films made from different structures

Abstract

Normal metal-superconductor decoupling as a source of thermal fluctuation noise in transition-edge sensors J. Appl. Phys. 112, 034515 (2012) Transport critical-current density of superconducting films with hysteretic ferromagnetic dots AIP Advances 2, 022166 (2012) Pressure effects on strained FeSe0.5Te0.5 thin films J. Appl. Phys. 111, 112610 (2012) Magnetoresistance and transistor-like behavior of a double quantum-dot via crossed Andreev reflections J. Appl. Phys. 111, 113905 (2012) What are the internal field and the vortex density along the edges of a coated conductor or a superconducting bridge carrying current?

Defect phenomena in superconducting oxides and analogous ceramic oxides

“…The influence of water on contacts shows many of the features expected from reaction with atmospheric moisture. Thus (Chang and Tsai 1988) the immersion of superconducting films of YBCO in water shows large differences in degradation between structures with and without silver. Water immersion at 20 OC causes rapid degradation of YBCO, affecting especially the contact resistance (which is poor after a mere 5 min) and the normal state resistance; however the silver-containing material survives far better.…”

Thermal expansion and specific heat of non-random YBCO/Ag composites

“…The superconducting YBCO/Ag composites are generally considered as potentially interesting systems for technical applications, mainly because of their larger critical current [1,2], lower normal resistivity [2] and better chemical stability against moisture [3] when compared with the pure polycrystalline material. A number of methods have been developed to prepare such materials.…”

Sintering characteristics of Y–Ba–Cu–oxide–Agx superconductors

“…For example, silver is reported to form an unstable silver oxide, which decomposes later at high temperatures, releasing oxygen and making it extremely useful in sintering of YBCO. 22 The silver is also reported to lower the sintering temperatures, enhance the rate of densification, and increase the rate of grain growth. 16 If silver releases oxygen at high temperatures as proposed by Ganapathi et al, 15 an oxygen-rich atmosphere around YBCO will be created that should reduce the rate of densification.…”