Abstract
In order to optimize the series array performance of Y Ba2Cu3O7−x (YBCO) grain boundary shunted junctions, a method to determine and control the junction resistance Rs and Au/YBCO contact resistivity ρ c has been developed. 200 nm thick c-oriented YBCO films were grown by intermittent thermal coevaporation on bicrystal yttria-stabilized zirconia substrates. A gold contact overlayer of thickness dn was deposited in situ. Normal junction resistances have been measured as a function of dn and shunt width w. It was shown that, in accordance with theoretical estimates, the junction shunt resistance is essentially controlled by the c-axis Au/YBCO interface specific resistance and scales as\(R_s = \frac{1}{w}\sqrt {\frac{{\rho _c \rho _n }}{{d_n }}} \). The product ρ c ρ n ≃ 3.10−14 Ω2cm3 was estimated from the experimental data, leading to ρ c ≈ 10−8 Ωcm2 for typical values of ρ n for gold thin films.
Similar content being viewed by others
References
A. M. Klushin, L. E. Amatuni, E. Sodtke, W. Prusseit, S.I. Borovitskii, V.D. Gelikonova, and Kh.A. Ainitdinov, Conference digest, suppl., 13 (1996), Conf. on Precision Electromagn. Meas. (CPEM'96), 17–20 June 1996, Braunschweig, Germany.
A. M. Klushin, W. Prusseit, E. Sodtke, L. E. Amatuni and H. Kohlstedt, Czech. J. Phys.46, Suppl. S3, 1317 (1996).
S. I. Borovitskii, A. M. Klushin, T. B. Korotina, A. E. Parijskii, S. K. Khoroshev, and P. A. Shisharin, Pis'ma Zh. Tekh. Fiz.11, 663 (1985) [Sov. Tech. Phys. Lett.11, 275 (1985)].
M. Yu. Kupriyanov and K.K. Likharev, Usp. Fiz. Nauk,49, 160 (1990) [Sov. Phys. Usp.,33, 340 (1990)].
J. W. Ekin, S. E. Russek, C. C. Clickner, and B. Jeanneret, Appl. Phys. Lett.,62, 369 (1993).
P. Berberich, B. Utz, W. Prusseit, and H. Kinder, Physica C219, 497 (1994).
M. Yu. Kupriyanov, Superconductivity,2, 5 (1989).
A. A. Golubov and M. Yu. Kupriyanov, Zh. Eksp. Teor. Fiz,105, 1442 (1994) [JETP,78, 777 (1994)].
S. C. Sanders, S.E. Russek, C.C. Clickner, and J.W. Ekin, IEEE Trans. Appl. Supercond.,5, 2404 (1995).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Klushin, A., Golubov, A., Prusseit, W. et al. Comparative study of shunted bicrystal Josephson junctions. J Low Temp Phys 106, 265–269 (1997). https://doi.org/10.1007/BF02399624
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02399624