Raman Scattering Study of the Effect of Nd Substitution into Ba Sites on the Phonon Spectrum of Nd1+xBa2-xCu3Oy (x=0–0.4, y=∼7)
- 1 April 1989
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 28 (4A) , L569-572
- https://doi.org/10.1143/jjap.28.l569
Abstract
We have carried out a study of the effect of trivalent Nd ion substitution into the divalent Ba site on the Raman spectra of Nd1+x Ba2-x Cu3O y (x=0–0.4, y=∼7) as a function of x. A systematic change occurs in the phonon band from 500 through 600 cm-1 which is related to the oxygen vibration in the BaO or CuO layer. The mode near 310 cm-1, which has been attributed to Cu(2)-O(2, 3) bending vibrations in the CuO2 layer, does not show substantial variation with an increase in x. These results are discussed in connection with the orbital character of the hole.Keywords
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