MgB2 THIN FILMS FOR RADIATION DETECTORS OPERATING AT MICROWAVE FREQUENCIES

Abstract

The aim of this work is to investigate the potential of superconducting magnesium diboride (MgB2) thin films, prepared by the in‐situ method, as broadband radiation detectors based on the microwave measurement of the complex impedance. The characterization of the films at microwave frequencies has been obtained by a coplanar resonator technique. The data analysis results in the determination of penetration depth, surface impedance and energy gap. In view of their microwave properties, particularly of the gap structure, the possible use of such MgB2 films as photon detectors is discussed in detail.