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The estimated flexoelectric coefficient is approximately one order of magnitude smaller as compared to that recently measured in SrTiO3 single crystals. The observed enhancement of piezoresponse signal at the grain boundaries is explained by the dipole moments associated with inhomogeneous distribution of oxygen vacancies.<\/jats:p>","DOI":"10.1063\/1.3037220","type":"journal-article","created":{"date-parts":[[2008,12,4]],"date-time":"2008-12-04T23:42:20Z","timestamp":1228434140000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":74,"title":["Room temperature surface piezoelectricity in SrTiO3 ceramics via piezoresponse force microscopy"],"prefix":"10.1063","volume":"93","author":[{"given":"Andrei","family":"Kholkin","sequence":"first","affiliation":[{"name":"University of Aveiro 1 Department of Ceramics and Glass Engineering, CICECO, , 3810-193 Aveiro, Portugal"}]},{"given":"Igor","family":"Bdikin","sequence":"additional","affiliation":[{"name":"University of Aveiro 1 Department of Ceramics and Glass Engineering, CICECO, , 3810-193 Aveiro, Portugal"}]},{"given":"Tetyana","family":"Ostapchuk","sequence":"additional","affiliation":[{"name":"Institute of Physics ASCR 2 , Na Slovance 2, 18221 Prague 8, Czech Republic"}]},{"given":"Jan","family":"Petzelt","sequence":"additional","affiliation":[{"name":"Institute of Physics ASCR 2 , Na Slovance 2, 18221 Prague 8, Czech Republic"}]}],"member":"317","published-online":{"date-parts":[[2008,12,4]]},"reference":[{"key":"2023062313051738500_c1","doi-asserted-by":"publisher","first-page":"758","DOI":"10.1038\/nature02773","volume":"430","year":"2004","journal-title":"Nature (London)"},{"key":"2023062313051738500_c2","doi-asserted-by":"publisher","first-page":"257602","DOI":"10.1103\/PhysRevLett.97.257602","volume":"97","year":"2006","journal-title":"Phys. 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