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  • 1
    Electronic Resource
    Electronic Resource
    X-ray diffraction studies of the epitaxy of a/b-axes oriented YBa2Cu3O7−δ films grown by liquid phase epitaxy (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5243-5248 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A detailed x-ray diffraction study is reported for a/b-axes oriented YBa2Cu3O7−δ films obtained by the liquid phase epitaxy technique. The films were grown epitaxially in the tetragonal state on (110) NdGaO3 substrates so that [001]film(parallel) [110]subs and [100]film(parallel) [001]subs, 90°-[100]/[010] boundaries were almost absent. Below the tetragonal-to-orthorhombic transition temperature, the film undergoes intensive {hh0}-type twinning. The volume of the a-axis oriented material is similar to that of the b-axis oriented fraction and the presence of both orientations is likely to be controlled by {hh0}-type twinning. High temperature diffraction of the substrate indicates that nucleation of YBa2Cu3O7−δ on (110) NdGaO3 takes place on a square two-dimensional lattice and therefore the observed strong in-plane alignment is probably controlled by impurity action and/or surface relaxation rather than simple mismatch effects. The difference between the thermal expansion coefficients of the film and the substrate (αfilm[100], αfilm[010](approximately-greater-than)αsubs[001]) is compensated for upon cooling by a slight rotation (ε∼0.12°) of {hh0}-type domain boundaries around the common [001] direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355722
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  • 2
    Electronic Resource
    Electronic Resource
    Liquid phase epitaxy of YBa"2Cu"3O"7"-"x on NdGaO"3 and LaGaO"3 substrates
    Amsterdam : Elsevier
    Journal of Crystal Growth 123 (1992), S. 611-614 
    Details
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-0248(92)90625-S
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    Paper (German National Licenses)
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