A non-destructive evaluation (NDE) system was set up in our laboratory. A high-Tc dc superconducting quantum interference device (dc SQUID) made from YBa2Cu3O7−δ thin film on a 24◦ bicrystal SrTiO3 substrate was adopted as the magnetic flux sensor. Novel excitation coils and a balance circuitry were proposed and employed for evaluation of multilayer aluminium structure with artificial slits in ...

It is shown that there are a significant number of quasiparticles present in the superconductor even at temperature far below transition and those seriously contribute to characteristics superconducting thin-film resonators.

Bolometric Response of Superconducting Microbridges and Single-Walled Carbon Nanotubes Daniel Ferguson Santavicca 2009 A bolometer is a device that uses a temperature-dependent resistance to detect power. The strongly temperature-dependent resistance of a superconductor biased on its superconducting phase transition can be used to make an extremely sensitive bolometric detector. We have develop...

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...

We describe a waveguide to thin-film microstrip transition for highperformance submillimetre wave and teraherz applications. The proposed constant-radius probe couples thin-film microstrip line, to fullheight rectangular waveguide with better than 99% efficiency (VSWR ≤ 1.20) and 45% fractional bandwidth. Extensive HFSS simulations, backed by scale-model measurements, are presented in the paper...

A current and temperature controlled delay in the time of flight of electrical pulses in YBa2Cu3O7-x (YBCO) spiral transmission lines has been studied by using ultrafast optoelectronic sampling techniques. The transmission line was configured in a stripline type on LaAlO3 substrate. The propagation time of ultrafast electrical pulses through the transmission line was measured as a function of t...

Local polarization of a magnetic layer, a well-known method for storing information, has found its place in numerous applications such as the popular magnetic drawing board toy or the widespread credit cards and computer hard drives. Here we experimentally show that a similar principle can be applied for imprinting the trajectory of quantum units of flux (vortices), travelling in a superconduct...

Strong intrinsic or interfacial spin-orbit coupling (SOC) can enable a thin-film superconductor to exceed the paramagnetic limit. For Rashba-type SOC, we show that superconducting thermodynamic properties of finite-size thin film are strongly sample-size dependent due creation edge states; for example, in case geometrically anisotropic films, critical field is found be tunable through direction...

Superconducting thin films are widely applied in various fields, including switching devices, because of their phase transition behaviors relation to temperature changes. Therefore, it is important quantitatively determine the optical constant a superconducting material thin-film state. We performed terahertz time-domain spectroscopy, based on 10 femtoseconds pulse laser, measure GdBa2Cu3O7?x (...

High resolution scanning Hall probe microscopy has been used to directly visualise the superconducting vortex behavior in hybrid structures consisting of a square array of micrometer-sized Py ferromagnetic disks covered by a superconducting Nb thin film. At remanence the disks exist in almost fully flux-closed magnetic vortex states, but the observed cloverleaf-like stray fields indicate the pr...