Abstract
In order to apply highT c superconductivity to general microwave cavities and to shielding devices for quasistationary magnetic fields, we have developed an electrophoretic coating technique. This work reports about the continuation of our experiments. More than 60 samples of electrophoretic layers deposited on silver substrates were fabricated by systematically varying the processing parameters. The r.f. surface resistance measured at 21.5 GHz and 77 K at low excitation fields is found to be a sensitive measure of the quality of the samples and falls rapidly with increasing average grain size. Textured electrophoretic layers of large grain size show the smallest sensitivity ofR s against the r.f. surface magnetic fieldH s. The magnetic sensitivitydR s /dH s is found to be in direct proportion toR s (77 K). After optimizing the sintering procedure the electrodes of the prototype cavity for a compact hydrogen maser were coated. The cavity was successfully operated at 1.42 GHz, and a surface resistance of 1 mΩ was achieved at 77 K. This compares to 4 mΩ for copper at the same temperature.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D. L. Rubin, K. Green, J. Gruschus, J. Kirchgessner, D. Moffat, H. Padamsee, J. Sears, Q. S. Shu, L. F. Schneemeyer, and J. V. Waszczak,Phys. Rev. B 38, 6538 (1988) and private communication.
N. Klein, G. Müller, H. Piel, B. Roas, L. Schultz, U. Klein, and M. Peiniger,Appl. Phys. Lett. 54, 757 (1989).
M. Hein, G. Müller, H. Piel, L. Ponto, M. Becks, U. Klein, and M. Peiniger,J. Appl. Phys. 66, 5940 (1989).
G. Müller, D. J. Brauer, R. Eujen, M. Hein, N. Klein, H. Piel, L. Ponto, U. Klein, and M. Peiniger,IEEE Trans. Magn. MAG-25, 2402 (1989).
H. S. Maiti, R. N. Basu, and S. Datta,Phase Transitions 19, 139 (1989).
N. Kouraet al., J. Electrochem. Soc. Jpn. (Denki Kagaku)56, 208 (1988).
C. T. Chu and B. Dunn,Appl. Phys. Lett. 55, 492 (1989).
D. E. Farrell, B. S. Chandrasekhar, M. R. Dguire, M. M. Fang, V. G. Kogan, J. R. Clem, and D. K. Finnemore,Phys. Rev. B 36, 4025 (1987).
F. Greuter, P. Kluge-Weiss, H. Zimmermann, and C. Schüler,Physica C 153–155, 361 (1988).
H. Küpfer, S. M. Green, C. Jiang, Yu Mei, H. L. Luo, R. Meier-Hirmer, and C. Politis,Z. Phys. B 71, 63 (1988).
Y. Iye, T. Tamegai, H. Takeya, and H. Takei,Physica B 148, 224 (1987).
U. Welp, W. K. Kwok, G. W. Crabtree, K. G. Vandervoort, and J. Z. Liu,Phys. Rev. Lett. 62, 1908 (1989).
N. Klein, G. Müller, S. Orbach, H. Piel, B. Roas, L. Schultz, U. Klein, and M. Peiniger,Physica C 162–164, 1549 (1989).
R. B. Hammond, G. V. Negrete, M. S. Schmidt, M. J. Mos-kowitz, M. M. Eddy, D. D. Strother, and D. L. Skoglund, Contribution to the 1990 IEEE Microwave Symposium.
H. Piel,Nucl. Instrum. Methods Phys. Res. A 287, 294 (1990).
M. Sato, T. Konaka, and K. Ishihara, Contribution to the 2nd Int. Symp. on Superconductivity Nov. 14–17, 1989, Tsukuba, Japan.
A. M. Portis, D. W. Cooke, and H. Piel,Physica C 162–164 (1989).
D. Kleppner, H. M. Goldenberg, and N. F. Ramsey,Phys. Rev. 126, 603 (1962).
D. Kleppner, H. C. Berg, S. B. Crampton, and N. F. Ramsey,Phys. Rev. 138, A972 (1965).
S. Wolf, Naval Research Laboratory, Washington D.C., private communication.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hein, M., Kraut, S., Mahner, E. et al. Electromagnetic properties of electrophoretic YBa2Cu3O7−δ films. Journal of Superconductivity 3, 323–329 (1990). https://doi.org/10.1007/BF00625275
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00625275