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Deformation of NiO single crystals below room temperature: dislocation configurations |
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| Authors: | M Jiménez-Melendo J P Riviére T Suzuki H Koizumi J Castaing A Domínguez-Rodríguez |
| Affiliation: | (1) Dpto. de Física de la Materia Condensada, Instituto de Ciencia de los Materiales, Aptdo. 1065, 41080 Sevilla, Spain;(2) Laboratoire de Physique des Matériaux, CNRS Bellevue, 92195 Meudon Cedex, France;(3) Institute of Industrial Science, University of Tokyo, Roppongi, Minato-Ku, 106 Tokyo, Japan |
| Abstract: | NiO single crystals prepared by two crystal growth techniques (zone melting in an arc-image furnace and Verneuil crystallization have been deformed by compression along  001 at temperatures as low as 4.2 K, and the dislocation substructure observed by transmission electron microscopy. The Peierls mechanism has been suggested as the mechanism controlling the mechanical behaviour at the lower temperatures. The dislocations generated at cavities found in the zone-melted crystals may be responsible for the increase of the flow stress of these crystals compared with the Verneuil ones. |
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