10 June 1996 Elastic and inelastic light scattering in the Zn- and Ni-doped YBa2Cu3O7
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We present the measurements of the elastically scattered 'plasma' lines intensities as well as the Raman spectra of YBa2(Cu1-xZnx)3O7 and YBa2(Cu1-xNix)3O7 as a function of the temperature and Zn or Ni content. In the case of elastic scattering we found two anomalies at the temperatures T equals Tc and T equals 150 K. This behavior is related to superconducting transition and indicates either the existence of charge fluctuation in temperature region from Tc to T equals 150 K or some electronic or surface phenomena. Furthermore, we analyzed the temperature dependence of the two Raman modes at 340 cm-1 and 440 cm-1. It is found that Zn substantially suppresses the superconductivity-induced phonon anomaly, whereas Ni does not affect it. Moreover, the superconductivity-induced phonon stiffening at the 440 cm-1 mode completely disappeared with Zn doping. This behavior might be explained considering Zn as a magnetic pair breaker.
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Milan J. Konstantinovic, Milan J. Konstantinovic, Rados Gajic, Rados Gajic, Jovan Konstantinovic, Jovan Konstantinovic, } "Elastic and inelastic light scattering in the Zn- and Ni-doped YBa2Cu3O7", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); doi: 10.1117/12.241740; https://doi.org/10.1117/12.241740

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