J. Phys. II France
Volume 3, Numéro 7, July 1993
Page(s) 1087 - 1096
DOI: 10.1051/jp2:1993185
J. Phys. II France 3 (1993) 1087-1096

Anomalies of the temperature dependence of electrostriction in blue phases

V. K. Dolganov1, O. R. Lourie1, G. Heppke2 and H.-S. Kitzerow2

1  Institute of Solid State Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow distr., Russia
2  Iwan-N.-Stranski-Institut, Sektretariat ER 11, Technische Universität Berlin, Strasse des 17. Juni 135, D-1000 Berlin 12, Germany

(Received 29 October 1992, accepted in final form 30 March 1993)

We investigated the field-induced shift of the blue phase diffraction bands. The temperature dependence of the electrostriction tensor components is determined for the first time. In the blue phase BPI at constant field strength ${\bf E}/\!\!/~[001]$, a change of the temperature leads to a change of both the unit cell volume and its shape. The deformation of the unit cell displays a pretransitional behaviour on approaching the BPI $\to$BPII phase transition temperature.


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