Surface resistance of thin Perovskite films - High-temperature superconductors and giant magnetoresistance manganites
Publication Type
Journal Article
Authors
Lofland, S.E., M. Dominguez, S.D. Tyagi, S.M. Bhagat, M.C. Robson, C. Kwon, Z. Trajanovic, I. Takeuchi, Ramamoorthy Ramesh, T. Venkatesan
Abstract
We present a systematic study of the surface resistance of perovskite thin films and bulk samples at microwave frequencies. The d.c. resistivity p of the various samples spans three orders of magnitude. For bulk samples, we obtain the usual ρ1/2 dependence of Rs. For ρ < 1 μΩ cm, Rs displays conventional behavior, i.e. Rs α ρ. However, for ρ > 1 μΩ cm, Rs is not proportional to ρ but to the conductivity σ. Using this fact, we have made the first direct observation of a peak in σ1, just below Tc in a-axis films of YBa2Cu3O7.
Journal
Thin Solid Films
Volume
288
Year of Publication
1996
ISSN
00406090
Notes
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