Intrinsic Josephson junctions in high-T/sub c/ superconductors as high frequency sources

Author

Schlenga, K. ; Hechtfischer, G. ; Walkenhorst, W. ; Muller, P. ; Regi, F.X. ; Savary, H. ; Schneck, J. ; Veith, M. ; Brodkorb, W. ; Steinbeiss, E.

Author_Institution

Walther-Meissner-Inst. fur Tieftemperaturforschung, Garching, Germany

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

3272

Lastpage

3275

Abstract

We report on microwave emission experiments of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/-single crystals at frequencies between 12 GHz and 95 GHz. Due to the intrinsic Josephson effect these samples form series connections of typically 2000 contacts. For the first time we observed phase-locking of more than 1000 junctions at 93.7 GHz in Bi/sub 1.8/Pb/sub 0.2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/ single crystals. Concerning the development of high frequency sources we report on first experiments on vertically structured thin films of Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/.<>

Keywords

Josephson effect; barium compounds; bismuth compounds; calcium compounds; high-temperature superconductors; microwave generation; strontium compounds; superconducting microwave devices; thallium compounds; 12 to 95 GHz; Bi/sub 1.8/Pb/sub 0.2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/; Bi/sub 1.8/Pb/sub 0.2/Sr/sub 2/CaCu/sub 2/O/sub 8/; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/ single crystals; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; Tl/sub 2/Ba/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/; high frequency sources; high-T/sub c/ superconductors; intrinsic Josephson junctions; microwave emission; phase locking; series connections; vertically structured thin films; Bandwidth; Bismuth compounds; Crystals; Frequency; Impedance matching; Josephson junctions; Oscillators; Superconductivity; Thin film circuits; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403290

Filename

403290