Polarization switching characteristics of flux grown KTiOPO4 and RbTiOPO4 at room temperature
2005 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 97, no 12, 124105- p.Article in journal (Refereed) Published
A study of polarization-switching characteristics under an applied electrical field at room temperature is presented for flux-grown KTiOPO4 and RbTiOPO4. By optimizing the experimental conditions, we determined the coercive field and the domain-switching time quantitatively by direct observation of the switching current. For both isomorphs, the inverse of the polarization-switching time, 1/t(s), follows an exponential dependence on the applied field E in low-field regime, and a linear dependence on E in the high-field regime. Domain morphology of KTiOPO4 based on selective etching reveals laminar structures elongated in the b crystallographic direction. An estimation of the domain-wall velocity shows that the domain speed in the polar direction is, at least, two orders of magnitude larger than in the a-b plane. The velocity along the b direction is similar to 30 times larger than along the a axis.
Place, publisher, year, edition, pages
2005. Vol. 97, no 12, 124105- p.
electrooptic imaging microscopy, potassium titanyl phosphate, periodically poled ktiopo4, lithium tantalite, ionic-conductivity, internal field, electric-field, blue-light, ferroelectric domains, single-crystals
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-7992DOI: 10.1063/1.1940135ISI: 000230278100083ScopusID: 2-s2.0-21644435070OAI: oai:DiVA.org:kth-7992DiVA: diva2:13193
QC 201008302005-10-252005-10-252015-03-30Bibliographically approved