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Effect of Oxygen Annealing on the Magnon-Pair Raman Scattering in La2CuO4-y

Published online by Cambridge University Press:  28 February 2011

I. Ohana ,
Y. C. Liu ,
M. S. Dresselhaus ,
G. Dresselhaus ,
A. J. Strauss ,
H. J. Zeiger ,
P. J. Picone ,
H. P. Jenssen  and
D. R. Gabbe
I. Ohana
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
Y. C. Liu
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
M. S. Dresselhaus
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
G. Dresselhaus
Affiliation:
Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139
A. J. Strauss
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA 02173
H. J. Zeiger
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA 02173
P. J. Picone
Affiliation:
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
H. P. Jenssen
Affiliation:
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
D. R. Gabbe
Affiliation:
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
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Abstract

Polarized Raman scattering spectra at 300K and 20K are reported for a single crystal of La2CuO4-y before and after annealing in oxygen at 1000°C for 24 hours. Oxygenation strongly quenches the temperature sensitive line at ∼1430 cm-1 (for T ∼ 300K) in the “as grown” crystal, previously identified with magnon-pair excitation associated with two-dimensional antiferromagnetic ordering. In addition, the phonon spectrum is greatly modified by the addition of oxygen, indicating a more uniform local crystalline environment after oxygenation. Raman scattering is thus a sensitive probe of the effect of oxygenation on the near surface magnetic and phonon properties of La2CuO4-y.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 439
Copyright
Copyright © Materials Research Society 1988

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References

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