Title :
Intrinsic Josephson effects in Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+x/ single crystals
Author :
Aigner, B. ; Avenhaus, B. ; Kleiner, R. ; Kreuzer, C. ; Kunkel, G. ; Pospischil, P. ; Steinmeyer, F. ; Muller, P. ; Andres, K.
Author_Institution :
Walther-Meissner-Inst., Garching, Germany
fDate :
3/1/1993 12:00:00 AM
Abstract :
The authors report on microwave emission of Bi/sub 2/Sr/sub 2/Ca/sub 2/O/sub 8+x/ single crystals with current flow along the c-axis. The results show that a small Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ single crystal behaves like a series array of several thousand Josephson junctions which can exhibit mutual phase-locking. At least at low temperatures there is evidence for mutual phase locking between several tens of junctions. It is noted that improving the crystal quality should increase the number of phase-locked junctions and therefore provide the possibility of using such crystals as naturally grown high-frequency oscillators.<>
Keywords :
Josephson effect; bismuth compounds; calcium compounds; high-temperature superconductors; microwave oscillators; strontium compounds; superconducting junction devices; superconducting microwave devices; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+x/; HTSC; Josephson junctions; intrinsic Josephson effects; microwave emission; mutual phase-locking; naturally grown high-frequency oscillators; series array; single crystals; Bismuth; Crystals; Electromagnetic coupling; Frequency; Grain boundaries; Josephson junctions; Phased arrays; Strontium; Temperature; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
