Controllability of specific domain structures in KNbO3 single crystals by electric poling at room temperature
2005 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 98, no 034107, 034107- p.Article in journal (Refereed) Published
The controllability of specific domain structures in KNbO3 single crystals was investigated by electric poling to several different orientations at room temperature. By applying electric field to the direction corresponding to the differetial direction between the original and intended spontaneous polarization directions (differential vector poling method), 60°-, 90°-, and 180°-domain pairs were successfully fabricated under control in KNbO3. The measured threshold electric field for 90°-domain pairs was the lowest (140 V/mm), which could be related to the difference between the piezoelectric coefficients of the poling direction. For 60°- and 90°-domain pairs, theoretical uncharged domain walls fabricated under control without the generation of other domain structures. For 120°-domain pairs, (011)pc uncharged domain wall was not observed, which suggests the difficulty in generating uncharged 120°-domain walls without passing through the phase transition.
Place, publisher, year, edition, pages
2005. Vol. 98, no 034107, 034107- p.
IdentifiersURN: urn:nbn:se:kth:diva-6111DOI: 10.1063/1.2001148ISI: 000231246100082OAI: oai:DiVA.org:kth-6111DiVA: diva2:10729
QC 201102032006-09-142006-09-142011-02-03Bibliographically approved