Surface resistance of thin Perovskite films — high-temperature superconductors and giant magnetoresistance manganites

We present a systematic study of the surface resistance of perovskite thin films and bulk samples at microwave frequencies. The d.c. resistivity ϱ of the various samples spans three orders of magnitude. For bulk samples, we obtain the usual ϱ 1 2 dependence of R s . For ϱ < 1 μΩ cm, R s displays...

Full description

Saved in:
Bibliographic Details
Published in:Thin solid films 1996-11, Vol.288 (1), p.256-261
Main Authors: Lofland, S.E., Dominguez, M., Tyagi, S.D., Bhagat, S.M., Robson, M.C., Kwon, C., Trajanovic, Z., Takeuchi, I., Ramesh, R., Venkatesan, T.
Format: Article
Language:English
Subjects:
Magnetic properties and measurements
Manganese
Resistivity
Superconductivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a systematic study of the surface resistance of perovskite thin films and bulk samples at microwave frequencies. The d.c. resistivity ϱ of the various samples spans three orders of magnitude. For bulk samples, we obtain the usual ϱ 1 2 dependence of R s . For ϱ < 1 μΩ cm, R s displays conventional behavior, i.e. R s ∂ ϱ. However, for ϱ > 1 μΩ cm, R s is not proportional to ϱ but to the conductivity σ. Using this fact, we have made the first direct observation of a peak in σ t, just below T c in a-axis films of YBa 2Cu 3O 7.
ISSN:0040-6090
1879-2731
DOI:10.1016/S0040-6090(96)08800-1