Abstract
The space groups of the room temperature- and high temperature-phases of a high Tc superconductor Ba2YCu3O7-y(y=0.1-0.2) have been determined to be Pmmm and P4/mmm by convergent-beam electron diffraction. Ribbon shaped diffuse scattering appeared at h=n, k=m/2 along the c* direction when the specimen was cooled, but did not transform into superlattice reflections even at the temperature of liq. He. This deffuse scattering can be originated from zone-boundary soft phonons of the longitudinal (or pseudo one-dimensional breathing) mode due to the one-dimensional O-Cu-O chains.
| Original language | English |
|---|---|
| Pages (from-to) | 1237-1239 |
| Number of pages | 3 |
| Journal | Japanese journal of applied physics |
| Volume | 26 |
| Issue number | 7A |
| DOIs | |
| Publication status | Published - 1987 Jul |
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
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Tanaka, M., Terauchi, M., Tsuda, K., & Ono, A. (1987). Electron diffraction study of ba2ycu3o7-y(y=0.1-0.2). Japanese journal of applied physics, 26(7A), 1237-1239. https://doi.org/10.1143/JJAP.26.L1237