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Magnetoresistance probe of spatial current variations in high‐T c YBa2Cu3O7–SrRuO3–YBa2Cu3O7 Josephson junctions
1.K. Char, M. S. Colclough, T. H. Geballe, and K. E. Myers, Appl. Phys. Lett. 62, 196 (1993).
2.L. Antognazza, K. Char, T. H. Geballe, L. L. H. King, and A. W. Sleight, Appl. Phys. Lett. 63, 1005 (1993).
3.P. Tiwari, X. D. Wu, S. R. Foltyn, M. Q. Le, I. H. Campbell, R. C. Dye, and R. E. Muenchausen, Appl. Phys. Lett. 64, 634 (1994).
4.R. Domei, C. L. Jia, C. Copetti, G. Ockenfuss, and A. I. Braginski, Semicond. Sci. Technol. 7, 277 (1994).
5.K. Char, L. Antognazza, and T. H. Geballe, Appl. Phys. Lett. 63, 2420 (1993).
6.C. B. Eom, R. J. Cava, R. M. Fleming, J. M. Phillips, R. B. van Dover, J. H. Marshall, J. W. P. Hsu, J. J. Krajewske, and W. F. Peck, Science 258, 1766 (1992).
7.S. C. Gausepohl, M. Lee, K. Char, R. A. Rao, and C. B. Eom, Phys. Rev. B (to be published).
8.A. A. Abrikosov, Fundamentals of the Theory of Metals (North-Holland, New York, 1988).
9.l is the shortest distance from one interface to the other in a plane perpendicular to H, i.e., l=sin(30°)=400 Å. From R(H,T) data on pure films (reported in Ref. 7), l is comparable to the elastic scattering length and smaller than the inelastic scattering length at 10 K, so that interface resistance should dominate.
10.There is no a priori physical justification for the Lorentzian shape. We sought a smooth function that fit well to the data and, of crucial importance, described accurately the half-width of the decay. The Lorentzian fulfills these requirements, but the same result for could be obtained from any reasonable function of proper half-width.
11.B. H. Moeckly, D. K. Lathrop, and R. A. Buhrman, Phys. Rev. B 47, 400 (1993).
12.E. Olsson and K. Char, Appl. Phys. Lett. 64, 1292 (1994).
13.S. Rozeveld, K. L. Merkle, and K. Char, in Proceedings of the 1994 Applied Superconductivity Conference (to be published).
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