Epitaxial growth of YNi$_{\textrm{2}}$B$_{\textrm{2}}$C films on single crystal MgO substrates: an HRTEM investigation of the interface. Reibold, M., Wimbush, S. C., Holzapfel, B., & Krämer, U. J. Alloys. Compd., 347(1-2):24–30, December, 2002.
Epitaxial growth of YNi$_{\textrm{2}}$B$_{\textrm{2}}$C films on single crystal MgO substrates: an HRTEM investigation of the interface [pdf]Paper  doi  abstract   bibtex   
Epitaxial thin films of the superconducting borocarbide compound YNi$_{\textrm{2}}$B$_{\textrm{2}}$C have been grown on single-crystal MgO (001) substrates using pulsed laser deposition. The deposition temperature has a strong influence on the structural properties of the films, which in turn affect the superconducting transition temperature, T$_{\textrm{c}}$. The resulting phases and their orientations with respect to the substrate have been investigated by X-ray diffraction and HRTEM, using cross-section samples. For deposition temperatures around 750 °C, c-axis oriented growth of YNi$_{\textrm{2}}$B$_{\textrm{2}}$C films occurs preferentially. At lower temperatures a weaker a-axis orientation was found by X-ray diffraction, whereas by HRTEM grains with a-axis and a weak c-axis orientation could be identified. An interfacial layer some 100 nm thick was formed bordering on the substrate, comprising mainly Y$_{\textrm{2}}$O$_{\textrm{3}}$ but also other epitaxially grown phases such as YNi$_{\textrm{4}}$B. The growth directions of Y$_{\textrm{2}}$O$_{\textrm{3}}$ are [001] at 750 °C and [111] at lower temperatures. The in-plane orientations and the lattice mismatches of the bordering phases were also investigated.

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