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Kristallumwandlung - Temperaturgesteuerte Strukturveränderung in Vanadiumdioxid-Einkristallen

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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.
DOI 10.3203/IWF/E-1728
IWF Signature E 1728
Publisher IWF (Göttingen)
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 Chemistry
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
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Transcript
Computer animation
Computer animation
Microscopy
Microscopy
Microscopy
Computer animation
Computer animation
Computer animation
Computer animation
Microscopy
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