Title :
High speed current switching of homogeneous YBaCuO film between superconducting and resistive states
Author :
Karasik, B.S. ; Milostnaya, I.I. ; Zorin, M.A. ; Elantev, A.I. ; Gol´tsman, Gregory N. ; Gershenzon, E.M.
Author_Institution :
Moscow State Pedagogical Inst., Russia
fDate :
6/1/1995 12:00:00 AM
Abstract :
Transitions of thin structured YBaCuO films from superconducting (S) to normal (N) state and back induced by a supercritical current pulse has been studied. A subnanosecond stage in the film resistance dynamic has been observed. A more gradual (nanosecond) ramp in the time dependence of the resistance follows the fast stage. The fraction of the film resistance which is attained during the fast S-N stage rises with the current amplitude. Subnanosecond N-S switching is more pronounced for smaller amplitudes of driving current and for shorter pulses. The phenomena observed are viewed within the framework of an electron heating model. The expected switching time and repetition rate of an optimized current controlling device are estimated to be 1-2 ps and 80 GHz respectively.<>
Keywords :
barium compounds; high-temperature superconductors; superconducting switches; superconducting thin films; yttrium compounds; 1 to 2 ps; 80 GHz; YBaCuO; current amplitude; driving current; electron heating model; fast S-N stage; film resistance dynamic; high speed current switching; high temperature superconductors; optimized current controlling device; repetition rate; resistive state; subnanosecond stage; superconducting state; supercritical current pulse; switching time; Electrons; High temperature superconductors; Identity-based encryption; Microwave technology; Optical attenuators; Optical films; Phonons; Substrates; Superconducting films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
