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Raman Measurements of Epitaxial YBa2Cu3O7–δ Films

Published online by Cambridge University Press:  28 February 2011

G. Burns ,
F. H. Dacol ,
C. A. Feild ,
A. Gupta ,
F. Holtzberg ,
G. Koren ,
R. Laibowitz ,
T. R. McGuire ,
A. P. Segmuller  and
T. K. Worthington
G. Burns
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
F. H. Dacol
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
C. A. Feild
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
A. Gupta
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
F. Holtzberg
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
G. Koren
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
R. Laibowitz
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
T. R. McGuire
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
A. P. Segmuller
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
T. K. Worthington
Affiliation:
IBM T. J. Watson Research Center Yorktown Heights, NY 10598–0218, USA
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Abstract

We have measured the infrared (IR) reflectance and Raman spectra of electron doped and undoped Nd2CuO4 and Pr2CuO4. Utilizing the results from doped ceramics and undoped ab plane oriented single crystals, we observe and assign all the IR active phonons (3A2u + 4Eu) predicted by group theory. We have also observed the Raman active modes involving atom motion along the c axis. We compare our results to those found in the related hole superconductors based upon La2CuO4.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1017
Copyright
Copyright © Materials Research Society 1990

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References

1 Koren, G., Gupta, A., Giess, E.A., Segmuller, A., and Laibowitz, R.B., Appl. Phys. Lett. 54, 1054 (1989).Google Scholar
2 Laibowitz, R. B., MRS Bulletin 14, 58 (1989).Google Scholar
3 Burns, G., Dacol, F., Freitas, P., Plaskett, T. and König, W., Solid State Commun. 64, 471 (1987).Google Scholar
4 Burns, G., Dacol, F. H., Holtzberg, F. and Kaiser, D., Solid State Commun. 66, 217 (1988).Google Scholar