Epitaxial Stabilization of Ultrathin Films of Rare-Earth Nickelates

Details Epitaxial Stabilization of Ultrathin Films of Rare-Earth Nickelates Epitaxial Stabilization of Ultrathin Films of Rare-Earth Nickelates

2011-12-22

arxiv.org/abs/1112.5348v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 3 figures

Scientific paper

We report on the synthesis of ultrathin films of highly distorted EuNiO3 (ENO) grown by interrupted pulse laser epitaxy on YAlO3 (YAO) substrates. Through mapping the phase space of nickelate thin film epitaxy, the optimal growth temperatures were found to scale linearly with the Goldschmidt tolerance factor. Considering the gibbs energy of the expanding film, this empirical trend is discussed in terms of epitaxial stabilization and the escalation of the lattice energy due to lattice distortions and decreasing symmetry. These findings are fundamental to other complex oxide perovskites, and provide a route to the synthesis of other perovskite structures in ultrathin-film form.

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