| Issue |
J. Phys. Colloques
Volume 33, Number C2, Avril 1972
2e CONGRÈS EUROPÉEN DE FERROÉLECTRICITÉ
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|---|---|---|
| Page(s) | C2-153 - C2-154 | |
| DOI | https://doi.org/10.1051/jphyscol:1972253 | |
2e CONGRÈS EUROPÉEN DE FERROÉLECTRICITÉ
J. Phys. Colloques 33 (1972) C2-153-C2-154
DOI: 10.1051/jphyscol:1972253
Laboratoire de Spectrométrie Physique, Domaine Universitaire Saint-Martin-d'Hères, 38, France
J. Phys. Colloques 33 (1972) C2-153-C2-154
DOI: 10.1051/jphyscol:1972253
DISPLACEMENTS AND VELOCITIES OF THE DOMAIN WALLS IN KDP EXISTENCE OF CRITICAL ELECTRIC FIELDS
J. BORNAREL and J. LAJZEROWICZLaboratoire de Spectrométrie Physique, Domaine Universitaire Saint-Martin-d'Hères, 38, France
Abstract
We report three results obtained in different experimental cases. They prove the existence of critical electric fields necessary to move the domain walls in KDP. We explain these phenomena by the critical shear stresses necessary to move the twinning dislocations which exist at the domain tips. The same conclusion can be applied to the ferroelectric crystals of the Rochelle salt, and gadolinium molybdate family.