Drag of a Cottrell atmosphere by an edge dislocation in a smectic-A liquid crystal

0479804 - FZÚ 2018 RIV IT eng J - Journal Article
Oswald, P. - Lejček, Lubor
Drag of a Cottrell atmosphere by an edge dislocation in a smectic-A liquid crystal.
European Physical Journal E. Roč. 40, č. 10 (2017), s. 84-93. ISSN 1292-8941. E-ISSN 1292-895X
Institutional support: RVO:68378271
Keywords : soft matter * liquid crystal
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 1.802, year: 2017

Cottrell cloud is the area near edge dislocation where the concentration of solute atoms (in metals) or gold nanoparticles (in smectic liquid crystal) are different front the mean concentration in the material. This difference is given by the interaction of interstitial atoms (nanoparticles) with edge dislocation. For small velocities of dislocation the Cottrell cloud of nanoparticles can move together with dislocation and thus decrease the dislocation mobility. In metallurgy the decreased mobility leads to strengthening of materials. Shape of the Cottrell cloud is calculated and the role of the diffusion anisotropy is evaluated.

Permanent Link: http://hdl.handle.net/11104/0275756