Title :
Response of YBaCuO thin films to electromagnetic radiation and their electrical characteristics
Author :
Afanasyev, A.S. ; Volkov, A.F. ; Gubankov, V.N. ; Divin, Yu.Ya. ; Shadrin, P.M.
Author_Institution :
Inst. of Radioeng. & Electron., Acad. of Sci., Moscow, USSR
fDate :
3/1/1989 12:00:00 AM
Abstract :
An investigation was conducted of the characteristic features of the interaction of electromagnetic radiation with different YBaCuO thin films varying from granular to epitaxial. The current-voltage characteristics and the voltage response of these films to millimeter-wave radiation were measured at temperatures from 4 to 100 K. The behavior of these characteristics for granular and polycrystalline films can be accounted for by a percolation mechanism of conductivity in a two-dimensional system of weak links existing between granulas or grains of the films and having different values of critical currents. It is shown that with the improvement of film structure the mechanism of film interaction with electromagnetic radiation is changed from percolation in the system of weak links between grains to heating in grains of the films
Keywords :
barium compounds; critical currents; crystal microstructure; electronic conduction in insulating thin films; granular structure; high-temperature superconductors; percolation; superconducting epitaxial layers; superconducting thin films; yttrium compounds; 4 to 100 K; EM radiation response; YBaCuO thin films; conductivity; critical currents; current-voltage characteristics; electrical characteristics; electromagnetic radiation; epitaxial films; film structure; granular films; heating; high temperature superconductivity; millimeter-wave radiation; percolation mechanism; polycrystalline films; two-dimensional system; voltage response; weak links; Conductive films; Conductivity measurement; Current measurement; Current-voltage characteristics; Electromagnetic radiation; Millimeter wave measurements; Temperature measurement; Transistors; Voltage; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
