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Title: Raman scattering in MBa/sub 2/Cu/sub 3/O/sub 7/ with M = Y, Eu, and Gd: Effect of /sup 18/O substitution and oxygen vacancies on the Cu: O vibrational modes

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)

We have studied the Cu-O vibrations in the MBa/sub 2/Cu/sub 3/O/sub 7/ systems with M = Y, Eu and Gd by Raman spectroscopy. The observed Raman features are similar in the three systems. The four Raman bands in the 300--700 cm/sup -1/ frequency region exhibit isotopic shifts upon /sup 18/O substitution implying that these modes involve oxygen vibrations. In oxygen-deficient YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ samples prepared in the range 0

Research Organization:
ATandT Bell Laboratories, Murray Hill, New Jersey 07974
OSTI ID:
5679811
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Vol. 36:16
Country of Publication:
United States
Language:
English