Microstructural study of copper‐intercalated niobium disulphide and tantalum disulphide Cux NbS2 and Cux TaS2 . I. Phase Transitions in Cu0.5 NbS2 and Cu0.5 TaS2
1
Rijksuniversitair Centrum Antwerpen
Тип публикации: Journal Article
Дата публикации: 1976-10-16
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Краткое описание
The phase transitions in the copper intercalated transition metal dichalcogenides Cu0.5NbS2 and Cu0.5TaS2 are studied by electron microscopy and diffraction. These materials are found to undergo upon cooling two distinct types of phase transitions. One is an order—disorder type of transition slightly below room temperature (γ β), which is accompanied by a particular configuration of diffuse scattering in the short range order state evolving into a distinct superstructure pattern at temperatures below 240 K. The microstructure is characterized by a domain structure exhibiting orientation as well as translation variants. At still lower temperatures a “continuous transformation” of displacive nature (β α) occurs whereby the host lattice becomes gradually modulated with the period of the intercalate. No further fragmentation into domains occurs. These transitions can be described in terms of a binary system (copper-vacancies) undergoing a solid-liquid transition.
Mit Elektronenmikroskopie und -beugung werden Phasenubergange in kupfereingelagerten Ubergangsmetalldichalkogeniden Cu0,5NbS2 und Cu0,5TaS2 untersucht. Es wird gefunden, das diese Materialien nach Abkuhlung zwei verschiedene Arten von Phasenuber-gangen durchlaufen. Einer ist der Ordnungs—Unordnungs-Ubergang leicht unterhalb Zimmertemperatur (γ β), der von einer besonderen Konfiguration diffuser Streuung im Nahordnungszustand begleitet ist und sich zu einem unterschiedlichen Superstrukturbild unterhalb 240 K entwickelt. Die Mikrostruktur wird durch eine Domanenstruktur charakterisiert, die sowohl Orientierungs- als auch Translationsvarianten zeigt. Bei noch tieferen Temperaturen tritt ein “kontinuierlicher Ubergang” vom Verschiebungscharakter auf (β α), wobei das Wirtsgitter graduell mit der Periode der Einlagerung moduliert wird. Eine weitere Aufteilung in Domanen tritt nicht auf. Diese Ubergange lassen sich durch ein binares System (Kupfer-Leerstellen) beschreiben, das einen Ubergang fest-flussig durchlauft.
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De Ridder R. et al. Microstructural study of copper‐intercalated niobium disulphide and tantalum disulphide CuxNbS2 and CuxTaS2. I. Phase Transitions in Cu0.5NbS2 and Cu0.5TaS2 // phys stat sol (a). 1976. Vol. 37. No. 2. pp. 591-606.
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De Ridder R., Van Tendeloo G., Van Landuyt J., van Dyck D., Amelinckx S. Microstructural study of copper‐intercalated niobium disulphide and tantalum disulphide CuxNbS2 and CuxTaS2. I. Phase Transitions in Cu0.5NbS2 and Cu0.5TaS2 // phys stat sol (a). 1976. Vol. 37. No. 2. pp. 591-606.
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TY - JOUR
DO - 10.1002/pssa.2210370230
UR - https://doi.org/10.1002/pssa.2210370230
TI - Microstructural study of copper‐intercalated niobium disulphide and tantalum disulphide CuxNbS2 and CuxTaS2. I. Phase Transitions in Cu0.5NbS2 and Cu0.5TaS2
T2 - phys stat sol (a)
AU - De Ridder, R.
AU - Van Tendeloo, G.
AU - Van Landuyt, J.
AU - van Dyck, D.
AU - Amelinckx, S.
PY - 1976
DA - 1976/10/16
PB - Wiley
SP - 591-606
IS - 2
VL - 37
SN - 0031-8965
SN - 1521-396X
ER -
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@article{1976_De Ridder,
author = {R. De Ridder and G. Van Tendeloo and J. Van Landuyt and D. van Dyck and S. Amelinckx},
title = {Microstructural study of copper‐intercalated niobium disulphide and tantalum disulphide CuxNbS2 and CuxTaS2. I. Phase Transitions in Cu0.5NbS2 and Cu0.5TaS2},
journal = {phys stat sol (a)},
year = {1976},
volume = {37},
publisher = {Wiley},
month = {oct},
url = {https://doi.org/10.1002/pssa.2210370230},
number = {2},
pages = {591--606},
doi = {10.1002/pssa.2210370230}
}
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De Ridder, R., et al. “Microstructural study of copper‐intercalated niobium disulphide and tantalum disulphide CuxNbS2 and CuxTaS2. I. Phase Transitions in Cu0.5NbS2 and Cu0.5TaS2.” phys stat sol (a), vol. 37, no. 2, Oct. 1976, pp. 591-606. https://doi.org/10.1002/pssa.2210370230.