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Media type:
E-Article
Title:
Anisotropy of thermal expansion in YAlO3 and NdGaO3
Contributor:
Chaix-Pluchery, O.;
Chenevier, B.;
Robles, J. J.
imprint:
AIP Publishing, 2005
Published in:Applied Physics Letters
Language:
English
DOI:
10.1063/1.1944901
ISSN:
0003-6951;
1077-3118
Origination:
Footnote:
Description:
<jats:p>YAlO 3 and NdGaO3 thermal expansion coefficients were measured using in situ powder x-ray diffraction in the temperature range of 28–650 °C. They exhibit a clear anisotropy: The expansion, quite similar along the [100] and [001] directions, is much lower along the [010] direction. The formation of cracks observed in YBa2Cu3O7−δ thin films deposited on YAlO3 and NdGaO3 substrates is likely related to the anisotropy. Stress value calculations have been performed in both systems. They indicate that the intrinsic components are specifically high in YAlO3.</jats:p>