Raman spectra of Y(Pr)Ba2Cu3O6+delta thin films and oxygen disorder

Eric Faulques; C. Gonzalez

doi:10.1117/12.241804

10 June 1996 Raman spectra of Y(Pr)Ba₂Cu₃O_6+deltathin films and oxygen disorder

Eric Faulques, C. Gonzalez

Proceedings Volume 2696, Spectroscopic Studies of Superconductors; (1996) https://doi.org/10.1117/12.241804
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

The materials used in this study are a (perpendicular) or c (perpendicular) oriented thin films of Y(Pr)Ba₂Cu₃O_6+(delta ) with thickness of 1400 angstrom to 3000 angstrom. The temperature dependence of the Raman spectrum of YBa₂Cu₃O_6.9 (YBCO) is presented using the excitation wavelength at 676.4 nm (red line). At 10 K all phonons exhibit Fano asymmetries. The phonon frequency and the linewidth of the bands at 335 and 449 cm^-1 show anomalous temperature dependence in the vicinity of T_c. Thin films with oxygen stoichiometry near to (delta) equals 0.9 are then investigated. Correlation is made between the appearance of strong Raman features at 230 and 596 cm^-1 and the oxygen disorder of the films.

Citation Download Citation

Eric Faulques and C. Gonzalez "Raman spectra of Y(Pr)Ba₂Cu₃O_6+deltathin films and oxygen disorder", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241804

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