A N-S point contact (platinum tip-ab-plane of a Bi2Sr2CaCu2O8 single crystal) has been used for the first time to detect the vortex motion in a high-Tc superconductor. The sweep of an external magnetic field led to the appearance of voltage pulses on the contact (when a constant current was passed through the contact), which were associated with the passage of individual vortices through the contact. An abrupt decrease of the pulse amplitude with increasing temperature has also been observed. This fact may be explained by thermal fluctuations of the vortex lattice.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering