On the structure responsible for the 2 2a0 ×2 2a0 diffraction pattern in YBa2 Cu3 O7-δ
Publication type: Journal Article
Publication date: 1990-05-01
scimago Q3
wos Q4
SJR: 0.313
CiteScore: 2.4
Impact factor: 1.0
ISSN: 09214534, 18732143
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Abstract
Abstract The 2 2 a 0 ×2 2 a 0 -phase appearing in YBa 2 Cu 3 O 7−δ at high δ, was extensively studied by means of electron diffraction and high resolution electron microscopy. The formation conditions and the existency-domains for the phase were determined. Deriving the possible space-groups from the reflection conditions for the superstructure naturally leads to an oxygen-vacancy ordered structure-model, with oxygen in the CuO 1−δ layer and oxygen vacancies in the BaO-layers. However, such a model of ordered point-defects in the YBa 2 Cu 3 O 7−δ -structure does not lead to satisfactory agreement between simulated and observed diffraction patterns. An alternative model, based on the Jahn-Teller type of deformation of the CuO 5 -pyramids in the CuO 2 -layer more satisfactorily agrees with observations. The streaks in the diffraction patterns, due to stacking disorder along the c -direction are also closely examined. Different correlations in the c -direction appear, observed at different stages of a heating process.
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Krekels T. et al. On the structure responsible for the 2 2a0×2 2a0 diffraction pattern in YBa2Cu3O7-δ // Physica C: Superconductivity and its Applications. 1990. Vol. 167. No. 5-6. pp. 677-690.
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Krekels T., Van Tendeloo G., Van Landuyt J., Amelinckx S., Shi T., Reyes-Gasga J. On the structure responsible for the 2 2a0×2 2a0 diffraction pattern in YBa2Cu3O7-δ // Physica C: Superconductivity and its Applications. 1990. Vol. 167. No. 5-6. pp. 677-690.
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TY - JOUR
DO - 10.1016/0921-4534(90)90686-9
UR - https://doi.org/10.1016/0921-4534(90)90686-9
TI - On the structure responsible for the 2 2a0×2 2a0 diffraction pattern in YBa2Cu3O7-δ
T2 - Physica C: Superconductivity and its Applications
AU - Krekels, T.
AU - Van Tendeloo, G.
AU - Van Landuyt, J.
AU - Amelinckx, S.
AU - Shi, T.-S.
AU - Reyes-Gasga, J.
PY - 1990
DA - 1990/05/01
PB - Elsevier
SP - 677-690
IS - 5-6
VL - 167
SN - 0921-4534
SN - 1873-2143
ER -
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@article{1990_Krekels,
author = {T. Krekels and G. Van Tendeloo and J. Van Landuyt and S. Amelinckx and T.-S. Shi and J. Reyes-Gasga},
title = {On the structure responsible for the 2 2a0×2 2a0 diffraction pattern in YBa2Cu3O7-δ},
journal = {Physica C: Superconductivity and its Applications},
year = {1990},
volume = {167},
publisher = {Elsevier},
month = {may},
url = {https://doi.org/10.1016/0921-4534(90)90686-9},
number = {5-6},
pages = {677--690},
doi = {10.1016/0921-4534(90)90686-9}
}
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MLA
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Krekels, T., et al. “On the structure responsible for the 2 2a0×2 2a0 diffraction pattern in YBa2Cu3O7-δ.” Physica C: Superconductivity and its Applications, vol. 167, no. 5-6, May. 1990, pp. 677-690. https://doi.org/10.1016/0921-4534(90)90686-9.