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Bereichsstrukturen in Supraleitern - Zwischenzustand in einer Typ-I-Bleischicht bei Veränderung des angelegten Magnetfeldes   [Other Title]

Domain Structures in Superconductors - Transient State in a Typ-I-layer of a Lead Caused by Variation of the Magnetic Field   [Title Translation]
Année de production: 1968
Genre: Documentary Film
Lieu de tournage: n/a

Générique:
Production company: Siemens AG, Zentrale Forschung und Entwicklung, Forschungslaboratorien (München)
First released by: IWF (Göttingen)
Distributor: IWF (Göttingen)
Author: Heinz Kirchner


Mot-clés: Blei, Faraday-Effekt, Supraleiter, Supraleiter, Faraday effect, lead, superconductor, superconductor
The intermediate-state structures of an evaporated superconducting lead film of 7 µm thickness in a vertically applied magnetic field of variable amplitude are presented. The domains have been made visible by means of the Faraday effect in thin evaporated EuS/EuF[2] films. The following topics are shown: 1.The penetration of magnetic flux, the formation of normal meanders and of normal honeycomb-like cells upon increasing the magnetic-field amplitude. 2.The nucleation of superconducting filaments, the formation of superconducting meanders and normal domains issuing the sample upon decreasing the magnetic-field amplitude. 3.The growth, the shrinkage and the disappearance of superconducting filaments upon slowly oszillating the magnetic-field amplitude.

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