We report measurements of the magnetic-field induced microwave complex
resistivity in REBa$_{2}$Cu$_{3}$O$_{7-\delta}$ thin films, with RE = Y, Sm.
Measurements are performed at 48 GHz by means of a ...resonant cavity in the
end-wall-replacement configuration. The magnetic field dependence is
investigated by applying a moderate (0.8 T) magnetic field along the c-axis.
The measured vortex state complex resistivity in
YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ and SmBa$_{2}$Cu$_{3}$O$_{7-\delta}$ is
analyzed within the well-known models for vortex dynamics. It is shown that
attributing the observed response to vortex motion alone leads to
inconsistencies in the as-determined vortex parameters (such as the vortex
viscosity and the pinning constant). By contrast, attributing the entire
response to field-induced pair breaking leads to a nearly quantitative
description of the data.
We demonstrate broadband 1.0-2.4 mum infrared supercontinuum generation with 0.4 mW output, using single-mode and few-mode tellurite holey fibers with very large mode area, of up to 3000 mum 2 .
We present a compared experimental investigation of the (a,b) plane
vortex-state complex resistivity at 48 GHz in YBaCuO, SmBaCuO and BiSrCaCuO
(2212). In YBaCuO and SmBaCuO the field dependence of ...the response can be
consistently described by a combination of flux flow and strong pair breaking
due to the presence of lines of nodes in the gap. In BiSrCaCuO (2212), by
contrast, the data might be described by the pair breaking alone.
Junctions modeled as ital S-ital N/ital I/ital S and ital S-ital N/ital I/ital N-ital S proximity systems (where ital S, ital I, and ital N indicate a superconductor, an insulator, and a normal ...metal, respectively) are widely discussed in literature from both the experimental and theoretical point of view. In the present paper experimental aspects concerning Nb/Nb junctions including a proximity bilayer are considered. Nb-ital M/ital I/Nb and ital M-Nb/ital I/Nb structures (where ital M is a normal metal, a semimetal, or a superconductor) are investigated by using a semimetal (bismuth) and a superconductor (aluminum) as the ital M layer. In particular, how the deposition of a back layer influences the behavior of Nb/ital I/Nb high-quality junctions is discussed, focusing the interest on measurements of the temperature dependence of the maximum dc Josephson current. Experimental data are discussed in the framework of Kresin's theoretical calculations based on the thermodynamic Green's function method.
We report measurements of the magnetic-field induced microwave complex resistivity in REBa\(_{2}\)Cu\(_{3}\)O\(_{7-\delta}\) thin films, with RE = Y, Sm. Measurements are performed at 48 GHz by means ...of a resonant cavity in the end-wall-replacement configuration. The magnetic field dependence is investigated by applying a moderate (0.8 T) magnetic field along the c-axis. The measured vortex state complex resistivity in YBa\(_{2}\)Cu\(_{3}\)O\(_{7-\delta}\) and SmBa\(_{2}\)Cu\(_{3}\)O\(_{7-\delta}\) is analyzed within the well-known models for vortex dynamics. It is shown that attributing the observed response to vortex motion alone leads to inconsistencies in the as-determined vortex parameters (such as the vortex viscosity and the pinning constant). By contrast, attributing the entire response to field-induced pair breaking leads to a nearly quantitative description of the data.
We present a compared experimental investigation of the (a,b) plane vortex-state complex resistivity at 48 GHz in YBaCuO, SmBaCuO and BiSrCaCuO (2212). In YBaCuO and SmBaCuO the field dependence of ...the response can be consistently described by a combination of flux flow and strong pair breaking due to the presence of lines of nodes in the gap. In BiSrCaCuO (2212), by contrast, the data might be described by the pair breaking alone.
