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Changes in Microwave Absorbtion of New High Tc Superconductors with Small Magnetic Fields

Published online by Cambridge University Press:  28 February 2011

K. Khachaturyan ,
E. R. Weber ,
P. Tejedor ,
A. Stacy  and
A. Portis
K. Khachaturyan
Affiliation:
Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720 Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720
E. R. Weber
Affiliation:
Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720 Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720
P. Tejedor
Affiliation:
Chemistry Department, University of California, Berkeley, CA 94720 Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720
A. Stacy
Affiliation:
Chemistry Department, University of California, Berkeley, CA 94720 Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720
A. Portis
Affiliation:
Physics Department, University of California, Berkeley, CA 94720 Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, University of California, Berkeley, CA 94720
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Abstract

A low field microwave absorbtion peak was observed with an EPR spectrometer in the new superconducting oxides‥ The peak disappeared above the superconducting transition temperature after exponential decrease with temperature in the transition region. The peak was sensitive to the magnetic fields the sample has been exposed before in the superconducting phase. Magnetic field dependent stochastic oscillations of the EPR baseline are ascribed to flux trapping in Josephson junctions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 383
Copyright
Copyright © Materials Research Society 1988

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References

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