Abstract
The article is devoted to some important, from the point of view of search of practical applications of new materials, physical aspects of the behavior of high-temperature superconducting (HTSC) thin films in strong electric fields. An analysis is made of factors limiting the superconducting cathode current. A review is given of HTSC emissive properties. The results of the investigation of switching of YBa2Cu3Ox thin films from the superconducting over to the normal state by field electron emission current are presented. It is shown that the time required for switching over to the normal state may attain a value of 10−9 s. A comparative analysis of switching of HTSC films by various methods (magnetic, current, thermal) shows that field electron emission current control of HTSC film switching devices is preferable in some technical applications. The feasibility of formation of nanostructures on HTSC film is discussed.
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