Reduction of surface resistance in superconducting thin films by microwave irradiation

We have experimentally observed dramatic reductions in the microwave surface resistance R s of superconducting aluminum thin films due to microwave pumping. For temperatures T > 0.97 T c , nearly complete suppression of the temperature-dependent component of R s occurred when the films were subje...

Full description

Saved in:

Bibliographic Details
Published in:	IEEE transactions on magnetics Vol. 21; no. 2; pp. 1004 - 1006
Main Author:	Amato, J.
Format:	Journal Article
Language:	English
Published:	IEEE 01-03-1985
Subjects:	Aluminum Magnetic films Microwave magnetics Superconducting films Superconducting microwave devices Superconducting thin films Surface resistance Temperature Thermal quenching Thermal stability
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	We have experimentally observed dramatic reductions in the microwave surface resistance R s of superconducting aluminum thin films due to microwave pumping. For temperatures T > 0.97 T c , nearly complete suppression of the temperature-dependent component of R s occurred when the films were subjected to a microwave magnetic field < 1 Oe at 11.4 GHz. Contrary to theoretical predictions, several abrupt transitions to superconducting states with lower R s were observed before the transition to the normal state. The reduction of R s may provide stability against thermal breakdown in rf cavities currently limited by defect-nucleated quench.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.1985.1063605