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Proximity-Effect and Tunneling in YBa2Cu3O7/Metal Layered Structures

Published online by Cambridge University Press:  28 February 2011

L. H. Greene ,
W. L. Feldmann ,
J. B. Barrier ,
L. A. Farrow ,
P. F. Miceli ,
R. Ramesh ,
B. J. Wilkens ,
B. G. Bagley ,
M. Giroud  and
J.M. Rowell
L. H. Greene
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
W. L. Feldmann
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
J. B. Barrier
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
L. A. Farrow
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
P. F. Miceli
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
R. Ramesh
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
B. J. Wilkens
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
B. G. Bagley
Affiliation:
Bellcore, 331 Newman Springs Rd., Red Bank, NJ, 07701, USA
M. Giroud
Affiliation:
CRTBT-CNRS, Grenoble, FR,
J.M. Rowell
Affiliation:
Conductus, Inc., Sunnyvale, CA, 94086, USA.
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Abstract

Superconducting thin films of YBa2Cu3O7 are prepared in-situ by on-axis, sputter deposition from a single, composite target. Our planar magnetron target composition of Y:Ba:Cu = 1.08:1.76:4.5 sputtered onto MgO at T~750°C in a 600mTorr Ar-O2 atmosphere yields reproducible superconducting films having Tc(R = 0)>80K and stoichiometry 1:2:3, that are shiny and of near epitaxial, crystalline quality. In order to ensure clean interfaces, YBa2Cu3O7/normal metal bilayers (to form SNS' Josephson junctions) and YBa2Cu3O7/normal metal/insulating barrier trilayers (to form SNIS' proximity tunnel junctions) are grown completely in-situ. (The S' = Pb counter electrode is evaporated ex-situ.) A supercurrent and Shapiro steps are observed in microwave irradiated SNS' (N = Ag) small area (5x10-5cm2) junctions. In SNIS' tunnel junctions, high-quality Pb tunneling is observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 991
Copyright
Copyright © Materials Research Society 1990

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References

1 See for example, Geerk, J., Xi, X. X., and Linker, G., Z. Phys B, 73, 329 (1988); A. Fournel, I. Oujia J. P. Sorbier, H. Noel J. C. Levet, M. Potel and P. Gougeon, Europhys. Lett. 6, 653 (1988); J. S. Tsai, I. Takeuchi, J. Fujita, S. Miura, T. Terashima. Y. Bando, K. Iljima and Y. Yamamoto Physica C 157, 537 (1989); M. Gurvitch, J. M. Valles, A. M. Cucolo, R. C. Dynes, J. P. Garno, L. F. Schneemeyer and J. V. Wasczak, Phys. Rev. Lett. 63,1008 (1989).Google Scholar
2 Hauser, J. J., Bacon, D. D. and Haemmerle, W. H., Phys. Rev. 151, 296 (1966); J. Geerk, M. Gurvitch, D. B. McWhan and J. M. Rowell, Physica 109 & 110B, 1775 (1982); For general review: E. L. Wolf Principles of Electron Tunneling Spectroscopy (Oxford University Press, N. Y., 1985) Chapter 5, and references therein.Google Scholar
3 Annett, J. F., Goldenfeld, N. and Renn, S. R., in Physical Properties of High Temperature Superconductors II, Ginsberg, D. M., ed., (World Scientific, Singapore, 1990) in press; N. Goldenfeld (private communication).Google Scholar
4 Greene, L. H., Barner, J. B., Feldmann, W. L., Farrow, L. A., Miceli, P. F., Ramesh, R., Wilkens, B. J., Bagley, B. G., Tarascon, J. M., Wernick, J. H., Giroud, M. and Rowell, J. M., in Proceedings of the International Conference on Materials and Mechanisms of Superconductivity-High Temperature Superconductivity, Stanford, CA, July 24–28, 1989, Physica C. (in press).Google Scholar
5 Eiken, J. W., Larson, T. M., Bergren, N. F., Nelson, A. J., Swartzlander, A. B., Kazmerski, L. L., Panson, A. J. and Blankenship, B. A., Appl. Phys. Lett. 52, 1819 (1988).Google Scholar
6 Moreland, J., Ono, R. H., Beall, J. A., Madden, M. and Nelson, A. J., Appl. Phys Lett. 54, 1477 (1989); K. Mizushima, M. Sagoi, T. Miura and J. Yoshida, Jpn. J. Appl. Phys. 27, L1489 (1988); H. Akoh, F. Shinoki, M. Takahashi and S. Takada, Jpn. J. Appl. Phys. 27, L519 (1988); P. M. Mankiewich, D. B. Schwartz, R. E. Howard, L. D. Jackel, B. L. Straughn, E. G. Burkhardt and A. H. Dayem, SPIE 948, 37 (1988); K. Mizushima, H. Kubota and Y. Yoshida, in Proceedings of the 2nd International Symposium on Superconductivity, Nov. 14-17, 1989, Tsukuba, Japan, (in press).Google Scholar
7 Budai, J. (private communication).Google Scholar
8 Bordet, P., Chaillout, C., Chenavas, J., Hodeau, J. L., Marezio, M., Karpinski, J. and Kaldis, E., Nature 334, 596 (1988); K. Char, M. Lee, R. W. Barton, A. F. Marshall, I. Bozovic, R. H. Hammond, M. R. Beasley, T. H. Geballe, A. Kapitulnik and S. S. Laderman, Phys. Rev. B 38, 834 (1988); J. Karpinski, E. Kaldis, E. Jilek, S. Rusiecki and B. Bucher, Nature, 336, 660 (1988); D. E. Morris, N. G. Asmar, J. H. Nickel, R. L. Sid, J. Y. T. Wei and J. E. Post, Physica C 159, 287 (1989).Google Scholar
9 Farrow, L. A., Venkatesan, T., Bonner, W. A., Wu, X. D., Inam, A. and Hegde, M. S., J. Appl Phys, 65, 4452 (1989); L. A. Farrow, S.-W. Chan, L. H. Greene and W. L. Feldmann, J. Appl. Phys 65, 2381 (1989).Google Scholar
10 Tsai, J. S., Kubo, Y. and Tabuchi, J., Phys Rev. Lett, 58, 1979 (1987); M. N. Keene, T. J. Jackson and C. E. Gough, Nature 340, 210 (1989).Google Scholar