Microwave cavity made from YBaCuO

Author

Radcliffe, W.J. ; Gallop, J.C. ; Langham, C.D. ; Gee, M. ; Stewart, M.

Author_Institution

NPL, Teddington, UK

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

990

Lastpage

992

Abstract

The authors report surface impedance measurements made on a cylindrical cavity resonator constructed entirely from the sintered high-temperature superconductor YBa₂Cu₃O₇. The temperature dependence of the surface impedance has been measured for five different modes in the frequency range 10-18 GHz and over the temperature range 4-300 K. Values for the penetration depth, linear coefficient of expansion, and normal state resistivity are derived from the data. The ultimate aim of this work is to produce very high Q cavities, operating far below their transition temperatures, where the temperature dependences of superconducting parameters become negligible. Such superconducting cavity resonators show promise as secondary frequency standards of the highest stability. The preliminary results with the first cavity are disappointing from this point of view

Keywords

barium compounds; cavity resonators; high-temperature superconductors; measurement standards; microwave measurement; yttrium compounds; 10 to 18 GHz; 4 to 300 K; YBa₂Cu₃O₇; cylindrical cavity resonator; high temperature superconductor; normal state resistivity; penetration depth; secondary frequency standards; sintered high-temperature superconductor; superconducting parameters; surface impedance measurements; temperature dependence; very high Q cavities; Cavity resonators; Frequency measurement; High temperature superconductors; Impedance measurement; Superconducting microwave devices; Superconducting transition temperature; Surface impedance; Temperature dependence; Temperature distribution; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92455

Filename

92455