Shunted bicrystal Josephson junctions arrays for voltage standards

• Published in: Applied physics letters Vol. 69; no. 11; pp. 1634 - 1636
• Main Authors: Klushin, A. M., Prusseit, W., Sodtke, E., Borovitskii, S. I., Amatuni, L. E., Kohlstedt, H.
• Format: Journal Article
• Language: English
• Published: 09-09-1996
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.117055

Series arrays of 365 shunted YBa2Cu3O7−x Josephson junctions on yttria-stabilized zirconia bicrystals were investigated under microwave irradiation in the K-band. Sub-arrays of up to 39 junctions were synchronized to the external microwave power at a temperature of 15 K. Although there was a considerable spread in the critical currents of the junctions and in the microwave bias current distribution, a first Shapiro step with a height of 30% of the total critical current of the sub-array was obtained by using an external shunt resistor, thus reducing the spread in normal resistances to 5%. Such high-Tc cryoelectronic circuits are applicable for voltage standards and precision digital-analog converters.