Abstract
We report the stability of TlBa2CaCu2O7 and Tl2Ba2CaCu2O8 on LaAlO3(100) epitaxial thin films, under a variety of conditions. All films are stable in acetone and methanol and with repeated thermal cycling to cryogenic temperatures. Moisture, especially vapor, degrades film quality rapidly. These materials are stable to high temperatures in either N2 or O2 ambients. While total degradation, resulting from Tl depletion, occurs at the same temperatures for both phases, 600 °C in N2 and 700 °C in O2, the onset of degradation occurs at somewhat lower temperatures for TlBa2CaCu2O7 than for Tl2Ba2CaCu2O8.
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Siegal, M.P., Overmyer, D.L., Venturini, E.L. et al. Stability of Tl–Ba–Ca–Cu–O superconducting thin films. Journal of Materials Research 14, 4482–4488 (1999). https://doi.org/10.1557/JMR.1999.0609
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DOI: https://doi.org/10.1557/JMR.1999.0609