Magnetic-field-induced non-linear effects of Josephson copuled superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}
- National Research Institute for Metals, Ibaraki (Japan); and others
The dc current-voltage (I-V) relation along the c-axis of single crystalline Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} has been measured in magnetic fields parallel and perpendicular to the c-axis. In zero field a clear and sharp jump with large hysteresis in the I-V curve was observed, indicative of the dc-Josephson effect. In magnetic field below a characteristic field B*{approx}0.4 T (at T=0 K) parallel to the c-axis the magnetic field suppresses the hysteresis and reduces the critical current I{sub c} drastically, whereas above B* the I-V curve becomes broad and featureless behavior. The characteristic field scale B* can be interpreted as an energy scale of the Josephson coupling between superconducting layers in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} and is argued with emphasis on the correlation length of pancake vortices in this system.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 136194
- Report Number(s):
- CONF-950144--
- Journal Information:
- Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 4 Vol. 8; ISSN JOUSEH; ISSN 0896-1107
- Country of Publication:
- United States
- Language:
- English
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