tA recent electro-magneto-elastic extension of microcontinuum elasticity is exploited to estimate the con-sequences of electro-elastic interactions, due to intrinsic polarization in ferroelectrics, on the propagationof acoustic modes. The model is applied and compared to a micromechanical analysis of perovskite-likestructures developed in the past and reducible to a micropolar continuum model. Qualitative and quan-titative effects due to electric dipole and quadrupole densities are discussed concerning phase speeds,cutoff frequencies and attenuation.
Acoustic waves in micropolar elastic ferroelectrics
ROMEO, MAURIZIO
2015-01-01
Abstract
tA recent electro-magneto-elastic extension of microcontinuum elasticity is exploited to estimate the con-sequences of electro-elastic interactions, due to intrinsic polarization in ferroelectrics, on the propagationof acoustic modes. The model is applied and compared to a micromechanical analysis of perovskite-likestructures developed in the past and reducible to a micropolar continuum model. Qualitative and quan-titative effects due to electric dipole and quadrupole densities are discussed concerning phase speeds,cutoff frequencies and attenuation.
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