Forschungszentrum Julich Gmbh

Knut Urban

Helmut Soltner

Ulrich Poppe

Horst Halling

Egon Zimmermann

Walter Glaas

Bernd Jungbluth

Mikhail Faley

Rolf Speen

The invention relates to a magnetic flow sensor () comprising a) a loop-shaped magnetic field conductor comprising a point () which expands to form a bar or a film (), a loop-shaped part () and at least one part () which guides back the magnetic field lines of the probe, b) SQUID (), c) and a diaphragm () comprising a hole (), whereby the part (&#x2033;) which guides the magnetic field lines of the probe back to the loop-shaped magnetic field conductor is connected to the diaphragm ().

Magnetic flow sensor comprising a magnetic field conductor and a hole diaphragm

c-axis oriented YBa.sub.2 Cu.sub.3 O.sub.7 layers are grown with intervening SrTiO.sub.3 layers bridged over steps at which there is a transformation to a-axis crystal-oriented growth. The multilayer superconductor has YBa.sub.2 Cu.sub.3 O.sub.7 layers which are not thicker than 500 nm while the intervening layers of SrTiO.sub.3 have thicknesses of 20 to 30 nm.

Method of producing an SrTiO.sub.3 /YBa.sub.2 Cu.sub.3 O.sub.7 layer

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Jülich, Germany

Knut Urban