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Optimization of annealing temperature for YBa2Cu3O7 thin films post-annealed at a low oxygen partial pressure (1991)

Mogro-Campero, A. ; Turner, L. G.

Springer

Journal of superconductivity 4 (1991), S. 279-282

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Details

ISSN: 1572-9605

Schlagwort(e): Superconducting films ; YBa2Cu3O7 ; annealing temperature ; LaAlO3

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik

Notizen: Abstract Post-annealing of YBa2Cu3O7 (YBCO) thin films is usually performed at 850–900°C in atmospheric-pressure oxygen. In this study, coevaporated YBCO films on LaAlO3 were post-annealed in an oxygen partial pressure of 29 Pa at temperatures in the range 700–825°C. Zero resistance transition temperatures were 89–90 K. Both d.c. (room-temperature resistance and critical-current density) and a.c. parameters (extracted from eddy-current response measurements at 25 MHz) were monitored. The optimum temperature is close to 750°C, which is on the YBCO thermodynamic stability line at this low oxygen partial pressure.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00618149

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