Abstract
Microwave surface resistance (R s ) measurements on large-area (11.4 cm2) Tl-based films deposited onto Ag (Consil 995) substrates have been made at a frequency of 18 GHz as a function of temperature. Deposition onto unoriented Ag substrates yields unoriented films characterized byR s values of 8.2 and 33.6 mΩ at 10.6 and 77 K, respectively. In contrast, similar deposition onto oriented Ag substrates yields oriented films with values of 12.6 and 14.6 mΩ at 11.2 and 77 K, respectively; corresponding Cu values are 9 and 21 mΩ. Additionally, it is found that the dependence ofR s on microwave surface magnetic fieldH s is weaker for the oriented films. These results suggest that the effect of orienting thec-axis in Tl films is twofold: (1) the high-frequency superconducting transition is made considerably sharper, resulting in a lowerR s value at 77 K, and (2) the rate of increase inR s with appliedH s is reduced. Both effects have significant ramifications for the potential application of these materials to high-frequency accelerating cavities.
Similar content being viewed by others
References
R. Simon,Solid State Technol. 32, 141 (1989).
N. Klein, G. Müller, H. Piel, B. Roas, L. Schultz, U. Klein, and M. Peiniger,Appl. Phys. Lett. 54, 757 (1989).
D. W. Cooke, E. R. Gray, R. J. Houlton, B. Rusnak, E. A. Meyer, J. G. Beery, D. R. Brown, F. H. Garzon, I. D. Raistrick, A. D. Rollett, and R. Bolmaro,Appl. Phys. Lett. 55, 914 (1989).
A. Inam, X. D. Wu, L. Nazar, M. S. Hegde, C. T. Rogers, T. Venkatesan, R. W. Simon, K. Daly, H. Padamsee, J. Kirch-gessner, D. Moffat, D. Rubin, Q. S. Shu, D. Kalokitis, A. Fathy, V. Pendrick, R. Brown, B. Brycki, E. Belohoubek, L. Drabeck, G. Grüner, R. Hammond, F. Gamble, B. M. Lairson, and J. C. Bravman,Appl. Phys. Lett. 56, 1178 (1990).
D. W. Cooke and E. R. Gray,Proceedings of the Workshop on High-Temperature Superconductivity, Huntsville, Alabama, May 23–25, 1989. Published by GACIAC, IIT Research Institute, 10 West 35th Street, Chicago, Illinois.
D. W. Cooke, E. R. Gray, P. N. Arendt, G. A. Reeves, R. J. Houlton, N. E. Elliott, and D. R. Brown,Appl. Phys. Lett., to be published.
P. N. Arendt, G. A. Reeves, N. E. Elliott, D. W. Cooke, E. R. Gray, R. J. Houlton, and D. R. Brown,AIP Conference Proceedings, High-T c Superconducting Thin Films: Processing, Characterization, and Applications, Boston, Massachusetts, October, 1989, to be published.
R. B. Hammond, G. V. Nagrete, M. S. Schmidt, M. J. Moskowitz, M. M. Eddy, D. D. Strother, and D. L. Skoglund,Proceedings of the 1990 IEEE Microwave Symposium, to be published.
H. S. Newman, A. K. Singh, K. Sadananda, and M. A. Imam,Appl. Phys. Lett. 54, 389 (1989).
W. L. Olson, M. M. Eddy, T. W. James, R. B. Hammond, G. Grüner, and L. Drabeck,Appl. Phys. Lett. 55, 188 (1989).
L. D. Chang, M. J. Moskowitz, R. B. Hammond, M. M. Eddy, W. L. Olson, D. D. Casavant, E. J. Smith, M. Robinson, L. Drabeck, and G. Grüner,Appl. Phys. Lett. 55, 1357 (1989).
T. L. Hylton and M. R. Beasley,Phys. Rev. B 39, 9042 (1989); T. L. Hylton, A. Kapitulnik, M. R. Beasley, J. P. Carini, L. Drabeck, and G. Grüner,Appl. Phys. Lett. 53, 1343 (1988).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cooke, D.W., Gray, E.R., Arendt, P.N. et al. Microwave surface resistance and power dependence of thallium-based films deposited onto large-area silver substrates. Journal of Superconductivity 3, 261–267 (1990). https://doi.org/10.1007/BF00625266
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00625266