Arrays of membrane isolated yttrium-barium-copper-oxide kinetic inductance bolometers

Enhanced transition temperature in a quantum confined high-Tc superconductor

A slight enhancement of the onset transition temperature Tc has been observed in quantum dots of the high-Tc superconductor yttrium–barium–copper oxide (Y1Ba2Cu3O7−δ). The dots were formed when YBCO particles (diameter ≤600 nm) were exposed to an RF plasma to produce a Coulomb crystal. The plasma damages the particles and causes 20–25 nm sized isolated islands of the correct 1-2-3 stoichiometry...

Field dependence of harmonic responses and their anisotropy in YBa2Cu3O7+δ thin films

The electrodynamic behaviour of the high-temperature superconductors is strongly affected by the anisotropy of these layered materials. When a pair of coils is positioned on opposite sides of a superconducting thin film, measurements of their mutual inductance can be used to infer the anisotropy of the superconductor. The fundamental and higher harmonic responses of YBa2Cu3O7+δ (YBCO) thin film...

Enhanced transition temperature in a quantum confined high-<i>T</i>_c superconductor

A slight enhancement of the onset transition temperature Tc has been observed in quantum dots of the high-Tc superconductor yttrium–barium–copper oxide (Y1Ba2Cu3O7−δ). The dots were formed when YBCO particles (diameter ≤600 nm) were exposed to an RF plasma to produce a Coulomb crystal. The plasma damages the particles and causes 20–25 nm sized isolated islands of the correct 1-2-3 stoichiometry...

PUBLICATION III Submillimeter-wave kinetic inductance bolometers on free-standing nanomembranes

We introduce a microwave submillimeter-wave detector based on an integrated micromesh absorber and superconducting kinetic inductance thermometer on a through-wafer released sub-micron thick membrane. Equilibrium operation achieved by thermal isolation through the membrane geometry enables operation at elevated thermal bath temperatures of 5–10 K. The bolometer operates in a phonon-noise limite...

AFRL-PR-WP-TP-2006-205 ADDITION OF NANOPARTICLE DISPERSIONS TO ENHANCE FLUX PINNING OF THE YBa2Cu3O7–x SUPERCONDUCTOR