Strain-induced ferromagnetism and magnetoresistance in epitaxial thin films of LaCoO 3 prepared by polymer-assisted deposition

High quality epitaxial thin films of LaCoO3 on SrTiO3 have been prepared by spin-coating of a metal/polymeric aqueous solution. The films (≈ 17 nm) are homogeneous and smooth over large areas. The characteristic low-spin (LS) state is replaced by a higher spin configuration of Co(III), due to strain...

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Bibliographic Details
Authors: Rivadulla Fernández, José Francisco, Bi, Zhenxing, Bauer, Eve, Rivas Murias, Beatriz, Vila Fungueiriño, José Manuel, Jia, Quanxi
Format: article
Publication Date:2013
Country:España
Institution:Universidad de Santiago de Compostela (USC)
Repository:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Language:English
OAI Identifier:oai:minerva.usc.gal:10347/45706
Online Access:https://hdl.handle.net/10347/45706
Access Level:Open access
Keyword:Polymer assisted deposition
LaCoO3
Epitaxial film
Ferromagnetism
Description
Summary:High quality epitaxial thin films of LaCoO3 on SrTiO3 have been prepared by spin-coating of a metal/polymeric aqueous solution. The films (≈ 17 nm) are homogeneous and smooth over large areas. The characteristic low-spin (LS) state is replaced by a higher spin configuration of Co(III), due to strain-induced distortions of the CoO6 octahedra, introducing a ferromagnetic interaction and negative magnetoresistance below TC = 85 K. This simple chemical method produces the high-quality films required for either fundamental studies or applications, similar to physical deposition techniques

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