Direct Observation of Discommensuration Arrays in Nbby Means of Low-Temperature Electron Microscopy
- 9 September 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 55 (11) , 1188-1191
- https://doi.org/10.1103/physrevlett.55.1188
Abstract
The pseudo one-dimensional compound Nb exhibits a lock-in-type phase transition around 50 K. Electron microscopy reveals the occurrence of discommensurations; their evolution as a function of temperature is reported. A microstructure model is proposed in which cooperative dephasing between one-dimensional Nb-string segments generates the discommensurations. An alternative description using concepts currently applied for long-period antiphase-boundary structures provides a valid description for the phenomena observed below room temperature.
Keywords
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