Engineering Transport in Manganites by Tuning Local Non-Stoichiometry in Grain Boundaries

Francesco Chiabrera, Iñigo Garbayo, Lluis López‐Conesa, Gemma Martín, Alicia Ruiz‐Caridad, Michael Walls, Luisa Ruiz‐González, Apostolos Kordatos, Marc Núñez , Alex Morata, Sonia Estradé , Alexander Chroneos, Francesca Peiró, Albert Tarancón

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Abstract

Interface-dominated materials such as nanocrystalline thin films have emerged as an enthralling class of materials able to engineer functional properties of transition metal oxides widely used in energy and information technologies. In particular, it has been proven that strain-induced defects in grain boundaries of manganites deeply impact their functional properties by boosting their oxygen mass transport while abating their electronic and magnetic order. In this work, the origin of these dramatic changes is correlated for the first time with strong modifications of the anionic and cationic composition in the vicinity of strained grain boundary regions. We are also able to alter the grain boundary composition by tuning the overall cationic content in the films, which represents a new and powerful tool, beyond the classical space charge layer effect, for engineering electronic and mass transport properties of metal oxide thin films useful for a collection of relevant solid-state devices.

Original languageEnglish
Article number1805360
Number of pages8
JournalAdvanced Materials
Volume31
Issue number4
Early online date4 Dec 2018
DOIs
Publication statusPublished - 25 Jan 2019

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Bibliographical note

This is the peer reviewed version of the following article: Chiabrera, F, Garbayo, I, López‐Conesa, L, Martín, G, Ruiz‐Caridad, A, Walls, M, Ruiz‐González, L, Kordatos, A, Núñez , M, Morata, A, Estradé , S, Chroneos, A, Peiró, F & Tarancón, A 2019, 'Engineering Transport in Manganites by Tuning Local Non-Stoichiometry in Grain Boundaries' Advanced Materials, vol. 31, no. 4, 1805360.which has been published in final form at 10.1002/adma.201805360. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Keywords

  • grain boundaries
  • interface-dominated materials
  • local nonstoichiometry
  • manganites
  • nanoionics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Chiabrera, F., Garbayo, I., López‐Conesa, L., Martín, G., Ruiz‐Caridad, A., Walls, M., ... Tarancón, A. (2019). Engineering Transport in Manganites by Tuning Local Non-Stoichiometry in Grain Boundaries. Advanced Materials, 31(4), [1805360]. https://doi.org/10.1002/adma.201805360