Title :
Constant-voltage steps at 0.1 Volt from a series array of high-Tc Josephson junctions
Author :
Klushin, A.M. ; He, M. ; Katkov, A.S.
Author_Institution :
CNI-Centre of Nanoelectronic Syst. for Inf. Technol., Forschungszentrum Julich GmbH, Julich
Abstract :
By employing an array of 620 high-Tc Josephson junctions, we have achieved a maximum quantum output voltage with approximate value of 0.1 V at a temperature of 79.2 K and a frequency of 77.465 GHz. We also demonstrate that steps on the current-voltage characteristic of an array of bicrystal junctions at voltages of 70 mV were flat over the current range of 150 muA with a relative uncertainty of 0.04 ppm.
Keywords :
high-temperature superconductors; superconducting arrays; superconducting junction devices; superconducting microwave devices; bicrystal junction array; current-voltage characteristics; dc quantum voltage standards; frequency 77.465 GHz; high-Tc Josephson junction series array; maximum quantum output voltage; synchronized Josephson junctions; temperature 79.2 K; voltage 70 mV; Circuits; Current-voltage characteristics; Frequency synchronization; High temperature superconductors; Josephson junctions; Metrology; Mirrors; Standards development; Substrates; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574674
