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

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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.

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References

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Authors and Affiliations

  1. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    I. Ohana & M. S. Dresselhaus

  2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    Y. C. Liu

  3. Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    G. Dresselhaus

  4. Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA, 02173, USA

    A. J. Strauss & H. J. Zeiger

  5. Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA

    P. J. Picone, H. P. Jenssen & D. R. Gabbe

Authors
  1. I. Ohana
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  2. Y. C. Liu
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  3. M. S. Dresselhaus
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  4. G. Dresselhaus
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  5. A. J. Strauss
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  6. H. J. Zeiger
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  7. P. J. Picone
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  8. H. P. Jenssen
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  9. D. R. Gabbe
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Ohana, I., Liu, Y.C., Dresselhaus, M.S. et al. Effect of Oxygen Annealing on the Magnon-Pair Raman Scattering in La2CuO4-y. MRS Online Proceedings Library 99, 439–442 (1987). https://doi.org/10.1557/PROC-99-439

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  • DOI: https://doi.org/10.1557/PROC-99-439

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