Thin films of Y-Ba-Cu-O on polycrystalline alumina
- 1 February 1989
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 1 (5) , 269-270
- https://doi.org/10.1088/0953-2048/1/5/009
Abstract
Polycrystalline alumina is the most widely used ceramic substrate in electronics. By using coevaporation and furnace annealing, the authors have repeatedly obtained thin films of the Y-Ba-Cu-O high temperature superconductor on polycrystalline alumina substrates with a zirconia buffer layer, with positive temperature coefficients of resistance and the highest reported transition temperatures on this substrate of 80 to 83 K. Critical current density was measured as a function of temperature; the value of 1800 A cm-2 at 40 K is similar to that found previously for unoriented polycrystalline films of this superconductor on other substrates.Keywords
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