Linewidth of Josephson oscillations in YBa2Cu3O7-x grain-boundary junctions

Yu. Ya. Divin, Jesper Mygind, Niels Falsig Pedersen, P. Chaudhari

Research output: Contribution to journalJournal articleResearchpeer-review

223 Downloads (Pure)


The AC Josephson effect in YBa2Cu3O7-x grain-boundary junctions (GBJs) was studied in the temperature range from 4 K 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 temperature of GBJ might be as low as the physical temperature in the temperature range investigated. This makes it possible to use the resistively shunted junction (RSJ) model with thermal fluctuations to get a limiting performance of high-T c devices utilizing the AC Josephson effect. The lowest value of the linewidth of 72 GHz Josephson oscillations observed at 77 K was equal to 380 MHz, which demonstrates the applicability of GBJ, particularly in the field of radiation spectroscopy, even at liquid nitrogen temperatures
Original languageEnglish
JournalI E E E Transactions on Applied Superconductivity
Issue number1, part 4
Pages (from-to)2337-2340
Publication statusPublished - 1993

Bibliographical note

Copyright: 1993 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

Fingerprint Dive into the research topics of 'Linewidth of Josephson oscillations in YBa2Cu3O7-x grain-boundary junctions'. Together they form a unique fingerprint.

Cite this