Electrodynamics of High-Temperature Superconductors

ISBN-13: 9789810212155 / Angielski

Alan M. Portis

Opis

These lectures are concerned with the application of high temperature superconductors to both passive and active high-frequency devices. The central issue addressed is the electrodynamics of granular supercondutors, particularly where grain boundaries (either natual or synthetic) act as Josephson weak-links. Grain boundaries are responsible for residual dissipation and for unwanted dependence of the electromagnetic properties on ambient magnetic fields and on elevated power level. Properly controlled, similar boundaries are the key to high sensitivity dc and rf SQUIDS at readily accessible temperatures, and to modulators, mixers and detectors. Such structures may make possible superconductive electronic devices in this temperature range as well as coherent sources of radiation in the very far infrared.