Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)

We report on the magnetism of charge-stripe ordered La(2)NiO(4.11±0.01) by neutron scattering and μSR. On going towards zero energy transfer there is an observed wave vector offset in the centring of the magnetic excitations and magnetic Bragg reflections, meaning the excitations cannot be described...

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Autores principales: Freeman, P. G., Giblin, S. R., Skoulatos, M., Mole, R. A., Prabhakaran, D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6783545/
https://www.ncbi.nlm.nih.gov/pubmed/31594985
http://dx.doi.org/10.1038/s41598-019-50904-8
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author Freeman, P. G.
Giblin, S. R.
Skoulatos, M.
Mole, R. A.
Prabhakaran, D.
author_facet Freeman, P. G.
Giblin, S. R.
Skoulatos, M.
Mole, R. A.
Prabhakaran, D.
author_sort Freeman, P. G.
collection PubMed
description We report on the magnetism of charge-stripe ordered La(2)NiO(4.11±0.01) by neutron scattering and μSR. On going towards zero energy transfer there is an observed wave vector offset in the centring of the magnetic excitations and magnetic Bragg reflections, meaning the excitations cannot be described as Goldstone modes of the magnetic order. Weak transverse field μSR measurements determine the magnetically order volume fraction is 87% from the two stripe twins, and the temperature evolution of the magnetic excitations is consistent with the low energy excitations coming from the magnetically ordered volume of the material. We will discuss how these results contrast with the proposed origin of a similar wave vector offset recently observed in a La-based cuprate, and possible origins of this effect in La(2)NiO(4.11).
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spelling pubmed-67835452019-10-16 Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11) Freeman, P. G. Giblin, S. R. Skoulatos, M. Mole, R. A. Prabhakaran, D. Sci Rep Article We report on the magnetism of charge-stripe ordered La(2)NiO(4.11±0.01) by neutron scattering and μSR. On going towards zero energy transfer there is an observed wave vector offset in the centring of the magnetic excitations and magnetic Bragg reflections, meaning the excitations cannot be described as Goldstone modes of the magnetic order. Weak transverse field μSR measurements determine the magnetically order volume fraction is 87% from the two stripe twins, and the temperature evolution of the magnetic excitations is consistent with the low energy excitations coming from the magnetically ordered volume of the material. We will discuss how these results contrast with the proposed origin of a similar wave vector offset recently observed in a La-based cuprate, and possible origins of this effect in La(2)NiO(4.11). Nature Publishing Group UK 2019-10-08 /pmc/articles/PMC6783545/ /pubmed/31594985 http://dx.doi.org/10.1038/s41598-019-50904-8 Text en © The Author(s) 2019 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
Freeman, P. G.
Giblin, S. R.
Skoulatos, M.
Mole, R. A.
Prabhakaran, D.
Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)
title Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)
title_full Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)
title_fullStr Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)
title_full_unstemmed Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)
title_short Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La(2)NiO(4.11)
title_sort wave vector difference of magnetic bragg reflections and low energy magnetic excitations in charge-stripe ordered la(2)nio(4.11)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6783545/
https://www.ncbi.nlm.nih.gov/pubmed/31594985
http://dx.doi.org/10.1038/s41598-019-50904-8
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