Title :
AC impedance measurements of two-dimensional superconductors
Author :
Jaccard, Y. ; Theron, R. ; Jeanneret, B. ; Meyer, R. ; Leemann, C. ; Martinoli, P.
Author_Institution :
Inst. de Phys., Neuchatel Univ., Switzerland
fDate :
3/1/1993 12:00:00 AM
Abstract :
The superconducting transition of two-dimensional systems is accurately characterized with a two-coil mutual inductance technique. A knowledge of the normal state sheet resistance R/sub N/ is necessary to incorporate the effect of eddy currents above the transition temperature. It is shown that, when carefully done, these measurements allow a determination of the real part of the impedance from R/sub N/ down to 10/sup -5/ R/sub N/, provided R/sub N/ is not exceedingly large.<>
Keywords :
copper; eddy currents; electric impedance measurement; lead; superconducting junction devices; superconducting thin films; AC impedance measurements; Pb-Cu proximity effect junctions; eddy current effects; normal state sheet resistance; superconducting transition; transition temperature; two-coil mutual inductance technique; two-dimensional superconductors; Electrical resistance measurement; Granular superconductors; High temperature superconductors; Impedance measurement; Josephson junctions; Phase measurement; Proximity effect; Superconducting coils; Superconducting transition temperature; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
