Modeling polarization for Hyper-NA lithography tools and masks
Kafai Lai, Alan E. Rosenbluth, et al.
SPIE Advanced Lithography 2007
We have studied the fluxoid quantization and the critical state of a YBa2Cu3O7-x (YBCO) loop, and vortex movement into the loop using a weakly coupled low-Tc superconducting quantum interference device (SQUID). The YBCO loop was made from a low-current-density polycrystalline film so that the critical-state behavior could be observed in modest magnetic fields at 4.2 K. As the magnetic field was swept, we observed a drastic change in the field responsivity of the SQUID when the loop went into and out of the critical state at a certain field H*. At fixed magnetic fields above and below H*, we measured the flux in the loop as a function of time by operating the SQUID in a flux-locked loop. Above H* we observed flux-creep-like behavior as well as the movement of individual flux quanta into the loop. Below H* we observed negligible dissipation in the form of flux quanta jumping into the loop, but did observe occasional hopping of individual vortices to other pinning sites in the YBCO. © 1992 The American Physical Society.
Kafai Lai, Alan E. Rosenbluth, et al.
SPIE Advanced Lithography 2007
Thomas E. Karis, C. Mark Seymour, et al.
Rheologica Acta
Michiel Sprik
Journal of Physics Condensed Matter
Hiroshi Ito, Reinhold Schwalm
JES