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Nanoindentation of the a and c domains in a tetragonal BaTiO3 single crystal

Park, Young-Bae and Dicken, Matthew J. and Xu, Zhi-Hui and Li, Xiaodong (2007) Nanoindentation of the a and c domains in a tetragonal BaTiO3 single crystal. Journal of Applied Physics, 102 (8). Art. No. 083507. ISSN 0021-8979. doi:10.1063/1.2795664.

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Nanoindentation in conjunction with piezoresponse force microscopy was used to study domain switching and to measure the mechanical properties of individual ferroelectric domains in a tetragonal BaTiO3 single crystal. It was found that nanoindentation has induced local domain switching; the a and c domains of BaTiO3 have different elastic moduli but similar hardness. Nanoindentation modulus mapping on the a and c domains further confirmed such difference in elasticity. Finite element modeling was used to simulate the von Mises stress and plastic strain profiles of the indentations on both a and c domains, which introduces a much higher stress level than the critical value for domain nucleation.

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Additional Information:© 2007 American Institute of Physics. (Received 1 July 2007; accepted 17 August 2007; published online 17 October 2007) This work has been supported by the National Science Foundation (Grant No. EPS-0296165) and the University of South Carolina NanoCenter.
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University of South CarolinaUNSPECIFIED
Subject Keywords:barium compounds; elastic moduli; elasticity; electric domains; ferroelectric materials; ferroelectric switching; finite element analysis; hardness; indentation; nucleation; plastic deformation
Issue or Number:8
Record Number:CaltechAUTHORS:PARjap07b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9020
Deposited By: Archive Administrator
Deposited On:20 Oct 2007
Last Modified:08 Nov 2021 20:55

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