Abstract
The ferroelastic behavior of relaxor 24Pb(In1/2Nb1/2)O3–46Pb(Mg1/3Nb2/3)O3–30PbTiO3 (PIN–PMN–PT) solid-solution single crystals was investigated under shear stresses using polarization light microscopy (PLM) and the scanning electron microscopy (SEM). Optical strain patterns along the \(\{110\}_{\text{cub}}\) directions from the orthoscope images under crossed Nicol, induced by shear stresses applied along the \([001]_{\text{cub}}\) direction, making use of a Vickers microindenter with a square-base diagonal line oriented along the \(\{100\}_{\text{cub}}\) directions of the crystal were observed on its \((001)_{\text{cub}}\) plate for the first time. These patterns at a diagonal position reveal a flowerlike pattern for ferroelastic transition from a square (S) lattice to a rectangular (R) lattice in a two-dimensional model system. A change in the interference color from yellow to blue through red toward the center in their flower leaves, according to the Michel–Levy birefringence chart, was observed. The ...
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