Abstract
Optical anisotropy in the ab plane has been studied in (2212)-type Bi(Pb)-Sr-Ca(Y, RE)-Cu-O single crystals and has been shown to be closely related to the microstructure of the samples. The single-phase samples were found to have different optical features characteristic for each phase. In a more general case, the crystals were composed of two (2212) phases with corresponding features. Such samples exhibited modulation of the lattice parameter in an electron diffraction pattern obtained in the ab plane. Optical anisotropy was mostly developed in the spectral range corresponding to electronic excitations in Bi-O planes.
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