Nonlinear inductive response of high temperature superconducting films measured by the mutual inductance technique

Clicks: 193
ID: 270975
1999
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Abstract
The dependence of the penetration depth λ on current densityJ in an unpatterned superconducting film can be measured with a pair of small coaxial coils positioned on opposite sides of the film. Mutual inductancemeasurements in this configuration with a direct-current (dc) current component in one of the coils provide a means to determine λ(J). It is possible to separate out the effects of heating by initially trapping a persistent current in the film. The nonlinear (current-dependent) coefficients of λ(J) measured by this “dc” technique agree well with those measured by third harmonic generation in coplanar waveguide transmission lines at 5 GHz. This nondestructure technique could be used to screen films before incorporating them into circuits sensitive to nonlinear effects.
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Authors J. H. Claassen,James C. Booth,J. A. Beall,L. R. Vale,R. H. Ono,D. A. Rudman;J. H. Claassen;James C. Booth;J. A. Beall;L. R. Vale;R. H. Ono;D. A. Rudman;
Journal Applied Physics Letters
Year 1999
DOI
10.1063/1.123248
URL
https://sciprofiles.com/publication/view/2b27d8323fd81fec0d3a1dcb52b31fa1
Keywords
current density thin film nondestructive testing copper electromagnetic field high temperature superconductor coplanar waveguide persistent current penetration depth transmission line

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