Abstract
The reflectivity of YBa 2(Cu 1-xNi x) 3O 7 ceramics was measured as a function of temperature and the Ni concentration (x = 0.01, 0.03 and 0.05). The obtained spectra are presented in the range 260–340 cm −1 which contains the two out-of-plane modes of the CuO 2 plane showing the highest phonon softening. The modes at 280 and 310 cm −1 soften around 5–6 and 3 cm −1 , respectively, upon cooling of the samples from 300 to 10 K. The softening is almost independent of the Ni content and equivalent to the effect observed in undoped YBa 2Cu 3O 7. Contrary to Zn doping, these results show that a partial substitution of copper with magnetic Ni ion does not affect much the phonon softening and superconductivity in the YBaCuO system.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
