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

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

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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. Applied Physics Letters is copyrighted by The American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Issue number25
Pages (from-to)3053-3055
Publication statusPublished - 1992

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Copyright (1992) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics

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