Nonlinear microwave properties of Nb{sub 3}Sn sputtered superconducting films

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365975· OSTI ID:527975

Andreone, A; Cassinese, A; Di Chiara, A; Iavarone, M; Palomba, F; Ruosi, A; Vaglio, R ^[1]

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1. Dipartimento di Scienze Fisiche, Universita di Napoli Federico II, Piazzale Tecchio 80, 1-80125 Napoli (Italy)

We report on microwave measurements of the surface impedance Z{sub s}=R{sub s}+iX{sub s} of Nb{sub 3}Sn superconducting films deposited by planar magnetron sputtering on sapphire substrates. The samples show the A15 structure with maximum T{sub c}(R=0) of 17.4 K and residual resistivity ratios up to {beta}{approx}3. The measurements are performed by a microstrip resonator technique using a meander line geometry. The power dependence of Z{sub s} is studied at different temperatures and frequencies in the range of 1{endash}10 GHz using the fundamental and higher order modes of the resonator. The effect of a dc magnetic field applied with different orientations is also studied. The data are analyzed in the context of a simple model able to describe most of the reported loss mechanisms. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 527975
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 82; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
ELECTRIC IMPEDANCE
FREQUENCY DEPENDENCE
MAGNETIC FIELDS
MICROWAVE RADIATION
NIOBIUM ALLOYS
NIOBIUM COMPOUNDS
SPUTTERING
SUPERCONDUCTING FILMS
TIN ALLOYS
TIN COMPOUNDS