Josephson oscillations and noise temperatures in YBa2Cu3O7−x grain-boundary junctions

21 December 1992

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 61 (25) , 3053-3055
https://doi.org/10.1063/1.108007

Abstract

The ac Josephson effect was studied in YBa2Cu3O7−x grain-boundary junctions (GBJ) in the temperature range from 4 to 90 K. The temperature dependence of the linewidth of millimeter-wave Josephson oscillations was measured and it is shown that the derived effective noise temperatures may be as low as the physical temperature in the temperature range investigated. In the millimeter-wave range, linewidths as low as 380 MHz were found at liquid-nitrogen temperatures.

Keywords

This publication has 4 references indexed in Scilit:

1/f noise in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ superconducting bicrystal grain-boundary junctions
Physical Review Letters, 1992
Orientation Dependence of Grain-Boundary Critical Currents in $Y {Ba}_{2} {Cu}_{3} O_{7 - δ}$ Bicrystals
Physical Review Letters, 1988
Incoherent radiation spectroscopy based on AC Josephson effect
IEEE Transactions on Magnetics, 1983
Nonresonant detection of Josephson radiation from thin-film microbridges
Journal of Applied Physics, 1977