Raman scattering in Fe-doped YBaCuO ceramics
V. P. GnezdilovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. V. EremenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. I. FominPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovN. M. ChaikovskayaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovS. A. Vasil’chenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovВ. І. ДоценкоPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
ABI
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Raman spectra of the ceramic samples of YBa2(Cu1–x Fex)3Oy (x = 1–0.1) have been studied at temperatures 300 K and 2 K. The frequency corresponding to the point at which the ratio of spectral intensities I(2 K)/I(300 K) = 1 is found to depend on the iron concentration. This is in qualitative agreement with the predictions of the Abrikosov–Gor’kov theory for classical superconductors with paramagnetic impurities.
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