The surface resistance of bulk polycrystalline YBa/sub 2/Cu/sub 3/O/sub 7/(-X)

Author

Tonkin, B.A. ; Proykova, Y.G.

Author_Institution

Div. of Phys., Portsmouth Polytech., UK

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1749

Lastpage

1752

Abstract

The surface resistance of viscous processed and powder processed bulk polycrystalline YBa/sub 2/Cu/sub 3/O/sub 7-X/ specimens have been measured as a function of frequency (27-38 GHz) and temperature (10-150 K) using an endwall replacement technique. The surface resistance of the viscous processed material within the 9-38 GHz frequency region gives a crossover frequency of 7.6 GHz. The temperature dependence of the superconducting state of material from both processing methods can be described by a two-gap BCS model which treats the sample as a network of weakly coupled superconducting grains.<>

Keywords

BCS theory; barium compounds; ceramics; high-frequency effects; high-temperature superconductors; materials preparation; powder technology; surface conductivity; yttrium compounds; 10 to 150 K; 9 to 38 GHz; YBa/sub 2/Cu/sub 3/O/sub 7/; bulk polycrystalline YBa/sub 2/Cu/sub 3/O/sub 7-X/; crossover frequency; endwall replacement technique; frequency dependence; powder processing; surface resistance; temperature dependence; two-gap BCS model; viscous processing; weakly coupled superconducting grains; Electrical resistance measurement; Frequency measurement; Impurities; Microwave measurements; Powders; Superconducting transition temperature; Surface resistance; Temperature dependence; X-ray diffraction; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402916

Filename

402916