publication . Doctoral thesis . 2010

Etude de la transition ferroelectrique-ferroelastique du KD2PO4 forme du front de phase en fonction du gradient thermique

Kvítek, Zdeněk;
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  • Published: 01 Jan 2010
  • Country: Czech Republic
Abstract
Etude de la transition ferroelectrique-ferroelastique du KD2PO4 forme du front de phase en fonction du gradient thermique The thesis explores complex process of first order transition of KD2PO4 crystal from tetragonal phase to ferroelectric - ferroelastic orthorhombic phase and back at temperature 209 K. The experimental set up of nitrogeneous cryostat allowes temperature and temperature gradient variations during simultaneous three axes optical sample observations, dielectric measurements. The discontinous change of order parameters especially strain uzz along tetragonal-feroelectric axis is important for form of phase front, which tents to be perpendicular to ...
Subjects
arXiv: Condensed Matter::Materials Science
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