Local switching properties of dense nanocrystalline BaTiO3 ceramics
2004 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 84, no 13, 2418-2420 p.Article in journal (Refereed) Published
The switching properties of dense BaTiO3 ceramics with 50 nm average grain size were investigated at local scale by piezoresponse force microscopy. Large areas with low piezoelectrical activity beside islands with strong piezoresponse were found. The application of electric fields induces stable domain structures and changes in the polarization state far away from the probing area, probably via trans-granular dipole interactions. Piezoelectric hysteresis loops were recorded on various positions, even in regions with initial zero piezoresponse, which possibly showed a superparaelectric behavior. The results are incontestable proof that 50 nm BaTiO3 ceramics retain ferroelectricity at a local scale.
Place, publisher, year, edition, pages
2004. Vol. 84, no 13, 2418-2420 p.
IdentifiersURN: urn:nbn:se:kth:diva-89035DOI: 10.1063/1.1695201ISI: 000220591500066OAI: oai:DiVA.org:kth-89035DiVA: diva2:502640
QC 201203052012-02-142012-02-142012-03-05Bibliographically approved