Abstract
MgB2 is atwo-gap superconductor and as a result may manifest unusual physical properties. The performanceof MgB2 films at microwave frequencies has so far been rather poor compared to that of Nballoys and this may result from intrinsic behaviour related to the double-gapstructure or extrinsic properties due to non-optimized thin films. Here we give adetailed report on the microwave magnetic field dependent surface impedance of anMgB2 thin film, using a parallel plate resonator, as a function of temperature. We discuss whetherthe framework used to analyse nonlinear behaviour for other superconductors, both low and highTc, but single-gap,has any validity for MgB2 and whether the films are limited by intrinsic or extrinsic behaviour. The key resultis the observation of junction-type switching effects at high microwave power.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
