TY - JOUR
T1 - Electron diffraction study of ba2ycu3o7-y(y=0.1-0.2)
AU - Tanaka, Michiyoshi
AU - Terauchi, Masami
AU - Tsuda, Kenji
AU - Ono, Akira
PY - 1987/7
Y1 - 1987/7
N2 - 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.
AB - 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.
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U2 - 10.1143/JJAP.26.L1237
DO - 10.1143/JJAP.26.L1237
M3 - Article
AN - SCOPUS:0023382912
VL - 26
SP - 1237
EP - 1239
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 7A
ER -