Abstract
A scanning acoustic microscope (SAM) and a scanning electron acoustic microscope (SEAM) have been used to study domain structures in ferroelectric BaTiO3, Bi4Ti3O12 and ferroelastic NdP5O14 single crystals. In SAM, domain walls act as scattering boundaries for leaky surface acoustic waves and thus sources of image contrast; While in SEAM, different signal generation and image contrast mechanisms may arise, mainly thermal elastic and piezoelectric effects. Further insight into the properties of domains was approached by discussing and comparing the image contrasts involved in both techniques.
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