Temperature dependence of microwave losses in Y-Ba-Cu-O films

We have made measurements of the T dependence of microwave absorption (at 22.7 GHz) in films of Y1Ba2Cu3Ox on SrTiO3 and LaGaO3 substrates. The superconducting transition temperatures were near 90 K. The film on SrTiO3 had predominantly c axis normal to the film, while the film on LaGaO3 was partial...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 1990-08, Vol.57 (9), p.940-942
Main Authors: PAKULIS, E. J, SANDSTROM, R. L, CHAUDHARI, P, LAIBOWITZ, R. B
Format: Article
Language:English
Subjects:
360204 - Ceramics, Cermets, & Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ENERGY LOSSES
Exact sciences and technology
LOSSES
MAGNETIC PROPERTIES
MATERIALS SCIENCE
MICROWAVE RADIATION
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
Physics
POWER LOSSES
Properties of type I and type II superconductors
RADIATIONS
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
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 have made measurements of the T dependence of microwave absorption (at 22.7 GHz) in films of Y1Ba2Cu3Ox on SrTiO3 and LaGaO3 substrates. The superconducting transition temperatures were near 90 K. The film on SrTiO3 had predominantly c axis normal to the film, while the film on LaGaO3 was partially a axis oriented. The microwave losses L for both films followed the temperature dependence given by L∝t/√1−t, with t=T/Tc. In the macroscopic theory of Ginzburg–Landau, this expression is proportional to the number of normal electrons within a penetration depth of the surface of the film, provided (1−t)≪1. However, we find that the above expression fits the data well for a wide range of T.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.104273