Observations of twinning in YBa2Cu3O6+x, 0 < x < 1, at high temperatures

Khosknevisan, B, Ross, DK, Broom, DP and Babaeipour, M 2002, 'Observations of twinning in YBa2Cu3O6+x, 0 < x < 1, at high temperatures' , Journal of Physics: Condensed Matter, 14 (41) , pp. 9763-9778.

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We report here on the nature of the twinning associated with the tetragonal to orthorhombic I (T/OI) phase transition in YBCO, for temperatures between 500 and 600ºC. In situ neutron diffraction measurements show the coexistence of the T and split OI peaks in the vicinity of the transition. However, by direct numerical simulation, we show that this is to be expected from the twinned OI structure when the separation of adjacent twinning planes and the orthorhombicity both approach zero. It is demonstrated that the observed hkl-dependent peak broadening is consistent with this interpretation. A comparison of the measured and simulated peak shapes enables us to make an approximate estimate of the actual twin widths for a given orthorhombicity.

Item Type: Article
Themes: Subjects / Themes > Q Science > QD Chemistry
Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Schools > School of Computing, Science and Engineering
Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre
Journal or Publication Title: Journal of Physics: Condensed Matter
Publisher: Institute of Physics
Refereed: Yes
ISSN: 09538984
Depositing User: H Kenna
Date Deposited: 23 Aug 2007 10:21
Last Modified: 27 Aug 2021 21:59
URI: https://usir.salford.ac.uk/id/eprint/328

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