@article{33784,
  keywords = {Multilayers, Lanthanum compounds, High temperature superconductors, Neodymium compounds, Electromagnetic wave polarization, Critical current density (superconductivity), Relaxation processes, Yttrium barium copper oxides, Electric current measurement, Electron transport properties, Electron tunneling, Superconducting devices, Critical current suppression, Differential current gain, Gate electrodes, Lanthanum aluminate, Lanthanum niobate, Neodymium strontium manganate, Spin polarized quasiparticle injection, Superconducting channel, Yttrium barium cuprates},
  author = {I Jin and Z Chen and T Wu and S.P Pai and Z Dong and S.B Ogale and Ramamoorthy Ramesh and T Venkatesan},
  title = {Spin-polarized quasiparticle injection into YBCO},
  abstract = {FET-type devices have been fabricated by using trilayers of Nd0.7Sr0.3MnO3 (NSMO) or LaNiO, (LNO) (gate)/ LaAlO3 (LAO) (barrier) / Yba2Cu3O7 (YBCO) (channel) in order to investigate effect of quasiparticle injection into YBCO. Here, NSMO and LNO were used as gate electrodes for injection of spin-polarized and spin-unpolarized quasiparticles into the superconducting channel, respectively. When injecting along the c-axis of YBCO, the critical current was suppressed with spin-polarized qiiasiparticles 30 times more efficiently than with spin-unpolarized quasiparticles. Differential current gain, defîned as a differential change of the critical current to injection current change, has been achieved up to ∼ 16 for c-axis YBCO. If the response time is limited by quasiparticle relaxation time of ∼ 10 ps, the device may be useful for fast electronics. Preliminary high-speed measurements indicate that part of the critical current suppression may be caused by quasiparticle injection, not all by heating. When injecting along a-axis, no significant dependence on quasiparticle polarization was observed. Other superconductors such as Pr1.85Ce0.15CuO4 (PCCO) and Pbln have been tested in similar devices for comparison. © 1999 IEEE.},
  year = {1999},
  journal = {IEEE Transactions on Applied Superconductivity},
  volume = {9},
  number = {2 PART 3},
  pages = {3640-3643},
  issn = {10518223},
  doi = {10.1109/77.783817},
  note = {cited By 2},
  language = {eng},
}