Observation of a narrow superconducting transition at 6 GHz in crystals of YBa2Cu3O7

D. L. Rubin, K. Green, J. Gruschus, J. Kirchgessner, D. Moffat, H. Padamsee, J. Sears, Q. S. Shu, Lynn Schneemeyer, J. V. Waszczak

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Abstract

We report measurements of the temperature dependence of the surface resistivity of highquality YBa2Cu3O7 crystals at 5.95 GHz. A narrow transition with 89-K onset is observed. Resistivity in the normal state is found to be Rnorm=126×10-3 Ω. We establish an upper limit for the resistivity at 77 K of 1.0×10-3 Ω and at 2 K of 1.5×10-5 Ω. The dissipation in four crystals with a total area of about 20 mm2 is measured to be nearly independent of peak microwave magnetic field over the range of 0.5 to 93 G in sharp contrast to the strong field dependence observed in bulk sintered samples.

Original languageEnglish
Pages (from-to)6538-6542
Number of pages5
JournalPhysical Review B
Volume38
Issue number10
DOIs
StatePublished - 1 Jan 1988

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Rubin, D. L., Green, K., Gruschus, J., Kirchgessner, J., Moffat, D., Padamsee, H., Sears, J., Shu, Q. S., Schneemeyer, L., & Waszczak, J. V. (1988). Observation of a narrow superconducting transition at 6 GHz in crystals of YBa2Cu3O7. Physical Review B, 38(10), 6538-6542. https://doi.org/10.1103/PhysRevB.38.6538