Microwave-Induced Constant Voltage Steps at Series Arrays of Josephson Tunnel Junctions with Near-Zero Current Bias
- 1 January 1984
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 33 (4) , 311-315
- https://doi.org/10.1109/tim.1984.4315230
Abstract
Microwave-induced, constant-voltage steps in the current-voltage characteristics of Josephson tunnel junctions are used as a reference voltage in cryogenic voltage standards. This relatively low reference voltage of a few millivolts could be increased by using series arrays of tunnel junctions instead of a single junction. Series arrays consisting of 2, 6, 14, and 54 tunnel junctions were tested at a frequency of 70 GHz. The use of this relatively high frequency and of lead-alloy base electrodes allows zero crossing steps of up to 34 mV to be observed for an array with only 54 junctions when irradiated by an RF power of 32 mW. The measurements were performed at 4.2 K.Keywords
This publication has 14 references indexed in Scilit:
- Tunnel barriers on Pb–In–Au alloy filmsJournal of Applied Physics, 1983
- Thermal stability of Pb-alloy Josephson junction electrode materials. VIII. Effects of Au addition to Pb-Bi counterelectrodesJournal of Applied Physics, 1983
- Fabrication of High Quality NbN/Pb Josephson Tunnel Junctions with Plasma Oxidized BarriersJapanese Journal of Applied Physics, 1982
- Thermal stability of Pb-alloy Josephson junction electrode materials. III. Correlation of microstructure and strain in Pb-In-Au base electrodesJournal of Applied Physics, 1982
- A Josephson voltage standard using a series array of 100 junctionsIEEE Transactions on Magnetics, 1981
- On a proposed Josephson-effect voltage standard at zero current biasApplied Physics Letters, 1980
- An inverse ac Josephson effect voltage standardApplied Physics Letters, 1977
- Current flow in large Josephson junctionsJournal of Applied Physics, 1975
- Oxidation of lead films by rf sputter etching in an oxygen plasmaJournal of Applied Physics, 1974
- Investigation of Microwave-Induced dc Voltages across Unbiased Josephson Tunnel JunctionsPhysical Review B, 1972