• Magnetic field sensitivity of variable thickness microbridges in tbcco, bscco and ybco. 

      Davidson, B. A.; Redwing, R. D.; Nguyen, T. D.; O'Callaghan Castellà, Juan Manuel; Raissi, F.; Lee, J. V.; Bruke, J. P.; Hohenwarter, G. K. G.; Nordman, J. E.; Beyer, J. B. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-12-31)
      Article
      Accés obert
      We describe results of a study comparing the magnetic field sensitivities of variable thickness bridge (VTB) arrays fabricated in TBCCO, BSCCO, and YBCO thin films. Identical structures were patterned in a variety of films, ...
    • Mechanisms for conduction via low-frequency noise measurements of High-Tc Thin-film microbridges 

      Nguyen, T. D.; O'Callaghan Castellà, Juan Manuel; Davidson, B. A.; Redwing, R. D.; Hohenwarter, G. K. G.; Nordman, J. E.; Beyer, J. B. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-01-31)
      Article
      Accés obert
      We have investigated possible mechanisms for conduction in high-T/sub c/ thin-film microbridges biased into the voltage state via the low-frequency noise properties. Measurements on thinned YBCO microbridges indicate that ...
    • Microwave noise parameter measurements of a high temperature superconducting flux flow transistor 

      O'Callaghan Castellà, Juan Manuel; Martens, J. S.; Thompson, J. H.; Beyer, J. B.; Nordman, J. E. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1991-02-28)
      Article
      Accés obert
      The noise parameters of a high-temperature superconducting (HTS) flux flow transistor made of TlBaCaCuO operating at 77 K and 3-5 GHz were experimentally determined. It is assumed that the dominant noise mechanism of the ...
    • Model predicts large-signal modfet performance 

      O'Callaghan Castellà, Juan Manuel; Beyer, J. B. (PENTON MEDIA, INC, 1989-11-30)
      Article
      Accés obert
      Modulation doped FETs (MODFETs) provide low-noise performance in many medium- and high-power microwave applications. Unfortunately, there are few large-signal models available for MODFETs, and determining the parameters ...