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Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)

Polarized and unpolarized neutron diffractions have been carried out to investigate the nature of the magnetic structures and transitions in monoclinic Co(3)TeO(6). As the temperature is lowered below 26 K long range order develops, which is fully incommensurate (ICM) in all three crystallographic d...

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Autores principales: Lee, Chi-Hung, Wang, Chin-Wei, Zhao, Yang, Li, Wen-Hsien, Lynn, Jeffrey W., Harris, A. Brooks, Rule, Kirrily, Yang, Hung-Duen, Berger, Helmuth
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5527072/
https://www.ncbi.nlm.nih.gov/pubmed/28743893
http://dx.doi.org/10.1038/s41598-017-06651-9
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author Lee, Chi-Hung
Wang, Chin-Wei
Zhao, Yang
Li, Wen-Hsien
Lynn, Jeffrey W.
Harris, A. Brooks
Rule, Kirrily
Yang, Hung-Duen
Berger, Helmuth
author_facet Lee, Chi-Hung
Wang, Chin-Wei
Zhao, Yang
Li, Wen-Hsien
Lynn, Jeffrey W.
Harris, A. Brooks
Rule, Kirrily
Yang, Hung-Duen
Berger, Helmuth
author_sort Lee, Chi-Hung
collection PubMed
description Polarized and unpolarized neutron diffractions have been carried out to investigate the nature of the magnetic structures and transitions in monoclinic Co(3)TeO(6). As the temperature is lowered below 26 K long range order develops, which is fully incommensurate (ICM) in all three crystallographic directions. Below 19.5 K additional commensurate magnetic peaks develop, consistent with the Γ(4) irreducible representation, along with a splitting of the ICM peaks along the h direction which indicates that there are two separate sets of magnetic modulation vectors. Below 18 K, this small additional magnetic incommensurability disappears, ferroelectricity develops, an additional commensurate magnetic structure consistent with Γ(3) irreducible representation appears, and the k component of the ICM wave vector disappears. Synchrotron x-ray diffraction measurements demonstrate that there is a significant shift of the electronic charge distribution from the Te ions at the crystallographic 8 f sites to the neighboring Co and O ions. These results, together with the unusually small electric polarization, its strong magnetic field dependence, and the negative thermal expansion in all three lattice parameters, suggest this material is an antiferroelectric. Below15 K the k component of the ICM structure reappears, along with second-order ICM Bragg peaks, which polarized neutron data demonstrate are magnetic in origin.
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spelling pubmed-55270722017-08-02 Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6) Lee, Chi-Hung Wang, Chin-Wei Zhao, Yang Li, Wen-Hsien Lynn, Jeffrey W. Harris, A. Brooks Rule, Kirrily Yang, Hung-Duen Berger, Helmuth Sci Rep Article Polarized and unpolarized neutron diffractions have been carried out to investigate the nature of the magnetic structures and transitions in monoclinic Co(3)TeO(6). As the temperature is lowered below 26 K long range order develops, which is fully incommensurate (ICM) in all three crystallographic directions. Below 19.5 K additional commensurate magnetic peaks develop, consistent with the Γ(4) irreducible representation, along with a splitting of the ICM peaks along the h direction which indicates that there are two separate sets of magnetic modulation vectors. Below 18 K, this small additional magnetic incommensurability disappears, ferroelectricity develops, an additional commensurate magnetic structure consistent with Γ(3) irreducible representation appears, and the k component of the ICM wave vector disappears. Synchrotron x-ray diffraction measurements demonstrate that there is a significant shift of the electronic charge distribution from the Te ions at the crystallographic 8 f sites to the neighboring Co and O ions. These results, together with the unusually small electric polarization, its strong magnetic field dependence, and the negative thermal expansion in all three lattice parameters, suggest this material is an antiferroelectric. Below15 K the k component of the ICM structure reappears, along with second-order ICM Bragg peaks, which polarized neutron data demonstrate are magnetic in origin. Nature Publishing Group UK 2017-07-25 /pmc/articles/PMC5527072/ /pubmed/28743893 http://dx.doi.org/10.1038/s41598-017-06651-9 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lee, Chi-Hung
Wang, Chin-Wei
Zhao, Yang
Li, Wen-Hsien
Lynn, Jeffrey W.
Harris, A. Brooks
Rule, Kirrily
Yang, Hung-Duen
Berger, Helmuth
Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)
title Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)
title_full Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)
title_fullStr Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)
title_full_unstemmed Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)
title_short Complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic Co(3)TeO(6)
title_sort complex magnetic incommensurability and electronic charge transfer through the ferroelectric transition in multiferroic co(3)teo(6)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5527072/
https://www.ncbi.nlm.nih.gov/pubmed/28743893
http://dx.doi.org/10.1038/s41598-017-06651-9
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