POLARIZED RAMAN-SCATTERING FROM Y1-XPRXBA2CU3O7 (0.1-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1) SINGLE-CRYSTALS

The polarized Raman spectra of Y1-xPrxBa2Cu3O7-delta single crystals (delta almost-equal-to 0, 0.1 less-than-or-equal-to x less-than-or-equal-to 1) were measured at room temperature in various scattering configurations allowing one to distinguish the diagonal (A(g)) and non-diagonal (B2g and B3g) modes. The (zz)-Raman spectra, corresponding to incident and scattered radiation polarized parallel to the c-axis, are very similar to that of YBa2Cu3O7. The (xx)-spectra, however, differ from those of both orthorhombic and tetragonal YBa2Cu3O7-delta. The variations with x of the non-diagonal B2g, B3g counterparts give evidence for a nearly constant anisotropy over the whole substitutional range.