Title :
Microwave measurements of superconducting Nb/sub 3/Sn films by a microstrip resonator technique
Author :
Andreone, A. ; Cassinese, A. ; Di Chiara, A. ; Iavarone, M. ; Palomba, F. ; Ruosi, A. ; Vaglio, R.
Author_Institution :
Dipartimento di Sci. Fisiche, Naples Univ., Italy
fDate :
6/1/1997 12:00:00 AM
Abstract :
We report on r.f. measurements of the surface impedance Zs=Rs+iXs of Nb/sub 3/Sn superconducting films deposited on sapphire by planar magnetron sputtering. The measurements are performed by a microstrip resonator technique using a meander line geometry. The power dependence of Zs is studied at different temperatures and frequencies in the range 1-18 GHz. The effects of a d.c. magnetic field applied with different orientations is also studied. The data are analyzed in the context of different models.
Keywords :
electric impedance; niobium alloys; sputtered coatings; superconducting thin films; tin alloys; type II superconductors; 1 to 18 GHz; Al/sub 2/O/sub 3/; DC magnetic field; Nb/sub 3/Sn; RF measurements; meander line geometry; microstrip resonator technique; microwave measurements; orientations; planar magnetron sputtering; power dependence; sapphire; superconducting Nb/sub 3/Sn films; surface impedance; Impedance measurement; Magnetic field measurement; Microwave measurements; Niobium; Sputtering; Superconducting films; Superconducting magnets; Superconducting microwave devices; Surface impedance; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
