Kristallumwandlung - Temperaturgesteuerte Strukturveränderung in Vanadiumdioxid-Einkristallen

Video in TIB AV-Portal: Kristallumwandlung - Temperaturgesteuerte Strukturveränderung in Vanadiumdioxid-Einkristallen

Formal Metadata

Title
Kristallumwandlung - Temperaturgesteuerte Strukturveränderung in Vanadiumdioxid-Einkristallen
Alternative Title
Crystalline Transformation - Temperature Controlled Change in the Structure of Vanadium Dioxide Single Crystals
Author
Guntersdorfer, Max
License
CC Attribution - NonCommercial - NoDerivatives 3.0 Germany:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
Identifiers
IWF Signature
E 1728
Publisher
Release Date
1972
Language
Silent film
Producer
Siemens AG, Zentrale Forschung und Entwicklung
Forschungslaboratorien München
Production Year
1968

Technical Metadata

IWF Technical Data
Film, 16 mm, 44 m ; F, 4 min

Content Metadata

Subject Area
Abstract
Kritischer Temperaturbereich. Verschieden orientierte Bereiche der doppelbrechenden Tieftemperaturphase. Halbleitende und metallische Phase bei VO[2]-Einkristallnadeln. Domänenwanderung. Peltier-Effekt. Mit Zeitraffung.
At a critical temperature of 65,5°C, vanadium oxide crystals exhibit a structural transformation which is associated with a semiconductor-to-metal transition. The double-refractive, low-temperature phase is split up into differently oriented domains which can be rendered visible under a polarization microscope. Filmed through such a microscope, the film shows the transitions between semiconducting and metallic phases of vanadium oxide monocrystal needles. The transformations are caused by the external application of heat or by current flow with defined angles resulting between the domain walls and the crystal axes. In the case of current passing through the crystals there are, in addition, domain migrations which are due to the Peltier Effect and depend upon the direction of the current flow.
Keywords Vanadiumdioxid / Feingefüge Umkristallisation / Vanadiumdioxid Peltier-Effekt Kristallverformung / Vanadiumdioxid Einkristall / Vanadiumdioxid monocrystal / vanadium dioxide crystal deformation / vanadium dioxide Peltier effect vanadium dioxide / fine structure crystallisation / fine structure
Vanadiumdioxid
Electric current
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Timings

  253 ms - page object

Version

AV-Portal 3.20.1 (bea96f1033d39fbe77f82542458e108105398441)
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