Stavola, Michael ; Krol, D. M. ; Weber, W. ; Sunshine, S. A. ; Jayaraman, A. ; Kourouklis, G. A. ; Cava, R. J. ; Rietman, E. A. (1987) Cu-O vibrations of Ba2YCu3Ox Physical Review B, 36 (1). pp. 850-853. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v36/i1/p850_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.36.850
Abstract
We present Raman and infrared absorption data for Ba2YCu3Ox with 7>x>6 for several samples with well-characterized oxygen content. Over this range the material has an oxygen-deficient tripled perovskite structure whose superconductivity properties depend critically on x. An orthorhombic-to-tetragonal transition occurs for x≅6.5. We have examined both phases for the frequency range ω>400 cm-1 which contains the Cu-O bond-stretching vibrations. A force-constant model has been developed which allows us to assign the features in the spectra. Our results are consistent with the linear Cu-O-Cu-O chains in Ba2YCu3O7 being absent in the nonsuperconducting Ba2YCu3O6.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 13325 |
| Deposited On: | 11 Nov 2010 08:06 |
| Last Modified: | 06 Jun 2011 05:35 |
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