Atomic and electronic structure of twin growth defects in magnetite

We report the existence of a stable twin defect in Fe(3)O(4) thin films. By using aberration corrected scanning transmission electron microscopy and spectroscopy the atomic structure of the twin boundary has been determined. The boundary is confined to the (111) growth plane and it is non-stoichiome...

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Autores principales: Gilks, Daniel, Nedelkoski, Zlatko, Lari, Leonardo, Kuerbanjiang, Balati, Matsuzaki, Kosuke, Susaki, Tomofumi, Kepaptsoglou, Demie, Ramasse, Quentin, Evans, Richard, McKenna, Keith, Lazarov, Vlado K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
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Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4753457/
https://www.ncbi.nlm.nih.gov/pubmed/26876049
http://dx.doi.org/10.1038/srep20943
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author Gilks, Daniel
Nedelkoski, Zlatko
Lari, Leonardo
Kuerbanjiang, Balati
Matsuzaki, Kosuke
Susaki, Tomofumi
Kepaptsoglou, Demie
Ramasse, Quentin
Evans, Richard
McKenna, Keith
Lazarov, Vlado K.
author_facet Gilks, Daniel
Nedelkoski, Zlatko
Lari, Leonardo
Kuerbanjiang, Balati
Matsuzaki, Kosuke
Susaki, Tomofumi
Kepaptsoglou, Demie
Ramasse, Quentin
Evans, Richard
McKenna, Keith
Lazarov, Vlado K.
author_sort Gilks, Daniel
collection PubMed
description We report the existence of a stable twin defect in Fe(3)O(4) thin films. By using aberration corrected scanning transmission electron microscopy and spectroscopy the atomic structure of the twin boundary has been determined. The boundary is confined to the (111) growth plane and it is non-stoichiometric due to a missing Fe octahedral plane. By first principles calculations we show that the local atomic structural configuration of the twin boundary does not change the nature of the superexchange interactions between the two Fe sublattices across the twin grain boundary. Besides decreasing the half-metallic band gap at the boundary the altered atomic stacking at the boundary does not change the overall ferromagnetic (FM) coupling between the grains.
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spelling pubmed-47534572016-02-23 Atomic and electronic structure of twin growth defects in magnetite Gilks, Daniel Nedelkoski, Zlatko Lari, Leonardo Kuerbanjiang, Balati Matsuzaki, Kosuke Susaki, Tomofumi Kepaptsoglou, Demie Ramasse, Quentin Evans, Richard McKenna, Keith Lazarov, Vlado K. Sci Rep Article We report the existence of a stable twin defect in Fe(3)O(4) thin films. By using aberration corrected scanning transmission electron microscopy and spectroscopy the atomic structure of the twin boundary has been determined. The boundary is confined to the (111) growth plane and it is non-stoichiometric due to a missing Fe octahedral plane. By first principles calculations we show that the local atomic structural configuration of the twin boundary does not change the nature of the superexchange interactions between the two Fe sublattices across the twin grain boundary. Besides decreasing the half-metallic band gap at the boundary the altered atomic stacking at the boundary does not change the overall ferromagnetic (FM) coupling between the grains. Nature Publishing Group 2016-02-15 /pmc/articles/PMC4753457/ /pubmed/26876049 http://dx.doi.org/10.1038/srep20943 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Gilks, Daniel
Nedelkoski, Zlatko
Lari, Leonardo
Kuerbanjiang, Balati
Matsuzaki, Kosuke
Susaki, Tomofumi
Kepaptsoglou, Demie
Ramasse, Quentin
Evans, Richard
McKenna, Keith
Lazarov, Vlado K.
Atomic and electronic structure of twin growth defects in magnetite
title Atomic and electronic structure of twin growth defects in magnetite
title_full Atomic and electronic structure of twin growth defects in magnetite
title_fullStr Atomic and electronic structure of twin growth defects in magnetite
title_full_unstemmed Atomic and electronic structure of twin growth defects in magnetite
title_short Atomic and electronic structure of twin growth defects in magnetite
title_sort atomic and electronic structure of twin growth defects in magnetite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4753457/
https://www.ncbi.nlm.nih.gov/pubmed/26876049
http://dx.doi.org/10.1038/srep20943
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