Dag Winkler

Weak links and dc SQUIDS on artificial nonsymmetric grain boundaries in YBa2Cu3O7−δ

We have studied weak links and dc–SQUIDs made from pulsed laser deposited YBa2Cu3O7−δ thin films on Y–ZrO2 bicrystal substrates. The transport properties of the weak links were studied as a function of the misorientation angle (θ) between the two halves of the bicrystal and an exponential dependence of the weak link critical current density was observed for angles up to 40° at 77 K. Josephson effects with clear microwave and magnetic field responses were observed. An optimum dc–SQUID performance at 77 K was obtained for θ=32°. At this temperature, we achieved a periodic magnetic field response with a modulation depth of 12 μV.

Evidence for coexistence of the superconducting gap and the pseudogap in Bi-2212 from intrinsic tunneling spectroscopy.

We present intrinsic tunneling spectroscopy measurements on small Bi

Linewidth measurements of Josephson flux‐flow oscillators in the band 280–330 GHz

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Magnetic Field Dependence of the Superconducting Gap and the Pseudogap in Bi2212 and HgBr2-Bi2212, Studied by Intrinsic Tunneling Spectroscopy

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Microstructure of an artificial grain boundary weak link in an YBa2Cu3O7−σ thin film grown on a (100)(110), [001]-tilt Y-ZrO2 bicrystal

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A new approach for bioassays based on frequency- and time-domain measurements of magnetic nanoparticles

CaCu

IN SITU CONTROLLED FABRICATION OF STACKS OF HIGH-TC INTRINSIC JOSEPHSON JUNCTIONS

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Flux‐flow transistors based on long YBa2Cu3O7−δ bicrystal grain boundary junctions

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High-T-c superconducting quantum interference device recordings of spontaneous brain activity: Towards high-T-c magnetoencephalography

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Nonequilibrium and bolometric photoresponse in patterned YBa2Cu3O7−δ thin films

mesas. The tunnel conductance curves show both sharp peaks at the superconducting gap voltage and broad humps representing the