Reversible changes of epitaxial thin films from perovskite LaNiO3 to infinite-layer structure LaNiO2

Reversible changes of epitaxial thin films from perovskite LaNiO3 to infinite-layer structure LaNiO2

An infinite-layer-structure epitaxial thin film of LaNiO2 was prepared by low-temperature reduction with CaH2 from a LaNiO3 epitaxial thin film grown on a SrTiO3(100) substrate. The oxygen content changed reversibly from the perovskite LaNiO3 to the infinite-layer LaNiO2 without losing the structura...

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Bibliographic Details
Published in:Applied physics letters Vol. 94; no. 8
Main Authors: Kawai, Masanori, Inoue, Satoru, Mizumaki, Masaichiro, Kawamura, Naomi, Ichikawa, Noriya, Shimakawa, Yuichi
Format: Journal Article
Language:English
Published: 23-02-2009
Online Access:Get full text
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Summary:An infinite-layer-structure epitaxial thin film of LaNiO2 was prepared by low-temperature reduction with CaH2 from a LaNiO3 epitaxial thin film grown on a SrTiO3(100) substrate. The oxygen content changed reversibly from the perovskite LaNiO3 to the infinite-layer LaNiO2 without losing the structural framework and the topotactic relationship. Consequently, the oxidation state of Ni ions in the film changed from trivalent to divalent to monovalent.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3078276