Nanoindentation induced piezoelectricity in SrTiO3 single crystals

abstract

Nanoindentation-induced polar properties in (0 0 1)-oriented SrTiO3 single crystals were analysed using piezoresponse force microscopy and local Raman spectroscopy measurements. The area directly beneath the indenter showed a strong piezoelectric response, together with an enhanced response in the area along the direction tangential to the residual indent. Stress-induced stable polarization states near the crack areas were also observed. Local poling performed on the strained areas suggests a possibility of polarization reversal and the stability of field-induced polar states. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

keywords

RAMAN-SPECTROSCOPY; THIN-FILMS; PHASE-TRANSITION; INDENTATION; FERROELECTRICITY; CERAMICS; STRESS; GROWTH

subject category

Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering

authors

Bdikin, I; Singh, B; Kumar, JS; Graca, MPF; Balbashov, AM; Gracio, J; Kholkin, AL

our authors

acknowledgements

The authors acknowledge the Portuguese Foundation for Science and Technology (FCT) for financial support via the Ciencia 2008 Program, PEst-C/EME/UI0481/2011 and SFRH/BPD/76184/2011.

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