Raman scattering spectra of high-Tc superconductors based on Bi-Sr-Ca-Cu-O
Fimberg T. A. , Ioon E. R., Past Ya. O., Rebane L. A.
The Raman scattering spectra and the temperature dependence of the direct-current resistance and of the diamagnetic screening have been measured for various stoichiometric compositions of the system Bi-Sr-Ca-Cu-O. The spectrum of the nonsuperconducting composition Bi2Sr2Ca2Cu40|, +y contains the bands at 299,463,543, and 616cm~'. The superconducting composition Bi6Sr7Ca2Cu6024+r (Tc = 70-80 К) is characterized by oscillations with frequencies of 292,462, and 626 cm-1.
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