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arXiv · 0811.1858

Synthesis of infinite-layer LaNiO2 films by metal-organic deposition

D. Kaneko·K. Yamagishi·A. Tsukada·T. Manabe·M. Naito
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Abstract

We report the synthesis of infinite-layer LaNiO2 thin films by metal organic decomposition. Our work is aimed to synthesize perovskite-like oxides with 3d9 electronic configuration, which is common to high-Tc copper oxides. The 3d9 configuration is very rare in oxides other than cuprates. Ni1+ oxides, even though Ni1+ is an unusual oxidation state, may be one of very few candidates. One example of the Ni1+ phases is infinite-layer LaNiO2. The bulk synthesis of LaNiO2 is difficult, but we demonstrate in this article that the thin-film synthesis of LaNiO2 by metal organic decomposition is rather easy. This is due to the advantage of thin films with a large-surface-to-volume ratio, which makes oxygen diffusion prompt. Resistivity measurements indicate that LaNiO2 is essentially a metal but unfortunately with no trace of superconductivity yet.

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D. Kaneko, K. Yamagishi, A. Tsukada, T. Manabe, M. Naito. 2008-11-12. Synthesis of infinite-layer LaNiO2 films by metal-organic deposition. https://doi.org/10.1016/j.physc.2009.05.104

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