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.Nanoindentationmodulus 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.
Published in Journal of Applied Physics, Volume 102, Issue 8, 2007, pages #083507-.
©Journal of Applied Physics 2007, American Institute of Physics.
Park, Y-B., Dicken, M. J., Xu, Z-H., & Li, X. (15 October 2007). Nanoindentation of the a and c Domains in a Tetragonal BaTiO3 Single Crystal. Journal of Applied Physics, 102 (8), #083507. http://dx.doi.org/10.1063/1.2795664