LONG-LIVED INDUCED RAMAN BANDS, APPEARANCE AND GREATER-THAN-OR-SIMILAR-TO-4CM(-1) SHIFT OF 500-BAND AS A RESULT OF PULSED IR(520-640CM(-1))LASER IRRADIATION ON YBACUO SINGLE-CRYSTALS

Single crystal YBa2Cu3O6.4 (E) over right arrow parallel to c irradiat ion by CO2-Ar laser caused (1) a shift of the ''500'' Raman band (480- 490 cm(-1)), which means the appearance of the superconducting phase i n the focus spot (proved by preliminary results of the inductive metho d); (2) the increase in intensity of many weakly lived Raman bands tha t usually look like ''pedestals'' of the ''500'' band (they were obser ved before as strictly reversible Ar+ laser photoinduced bands). The a dditional (similar to 10 components) structure was developed in the re gion 400-600 cm(-1) on the Raman spectra by comparison of spectra for samples before and after irradiation. By reconstruction of such spectr a we analyzed the composition of the sample, which was assumed to be a mixture of microregions with different oxygen content.