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Tensor description of X-ray magnetic dichroism at the Fe L (2,3)-edges of Fe(3)O(4)
A procedure to build the optical conductivity tensor that describes the full magneto-optical response of the system from experimental measurements is presented. Applied to the Fe L (2,3)-edge of a 38.85 nm Fe(3)O(4)/SrTiO(3) (001) thin-film, it is shown that the computed polarization dependence usin...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7842224/ https://www.ncbi.nlm.nih.gov/pubmed/33399575 http://dx.doi.org/10.1107/S1600577520015027 |
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author | Elnaggar, Hebatalla Haverkort, Maurits W. Hamed, Mai Hussein Dhesi, Sarnjeet S. de Groot, Frank M. F. |
author_facet | Elnaggar, Hebatalla Haverkort, Maurits W. Hamed, Mai Hussein Dhesi, Sarnjeet S. de Groot, Frank M. F. |
author_sort | Elnaggar, Hebatalla |
collection | PubMed |
description | A procedure to build the optical conductivity tensor that describes the full magneto-optical response of the system from experimental measurements is presented. Applied to the Fe L (2,3)-edge of a 38.85 nm Fe(3)O(4)/SrTiO(3) (001) thin-film, it is shown that the computed polarization dependence using the conductivity tensor is in excellent agreement with that experimentally measured. Furthermore, the magnetic field angular dependence is discussed using a set of fundamental spectra expanded on spherical harmonics. It is shown that the convergence of this expansion depends on the details of the ground state of the system in question and in particular on the valence-state spin–orbit coupling. While a cubic expansion up to the third order explains the angular-dependent X-ray magnetic linear dichroism of Fe(3+) well, higher-order terms are required for Fe(2+) when the orbital moment is not quenched. |
format | Online Article Text |
id | pubmed-7842224 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-78422242021-02-05 Tensor description of X-ray magnetic dichroism at the Fe L (2,3)-edges of Fe(3)O(4) Elnaggar, Hebatalla Haverkort, Maurits W. Hamed, Mai Hussein Dhesi, Sarnjeet S. de Groot, Frank M. F. J Synchrotron Radiat Research Papers A procedure to build the optical conductivity tensor that describes the full magneto-optical response of the system from experimental measurements is presented. Applied to the Fe L (2,3)-edge of a 38.85 nm Fe(3)O(4)/SrTiO(3) (001) thin-film, it is shown that the computed polarization dependence using the conductivity tensor is in excellent agreement with that experimentally measured. Furthermore, the magnetic field angular dependence is discussed using a set of fundamental spectra expanded on spherical harmonics. It is shown that the convergence of this expansion depends on the details of the ground state of the system in question and in particular on the valence-state spin–orbit coupling. While a cubic expansion up to the third order explains the angular-dependent X-ray magnetic linear dichroism of Fe(3+) well, higher-order terms are required for Fe(2+) when the orbital moment is not quenched. International Union of Crystallography 2021-01-01 /pmc/articles/PMC7842224/ /pubmed/33399575 http://dx.doi.org/10.1107/S1600577520015027 Text en © Hebatalla Elnaggar et al. 2021 http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Research Papers Elnaggar, Hebatalla Haverkort, Maurits W. Hamed, Mai Hussein Dhesi, Sarnjeet S. de Groot, Frank M. F. Tensor description of X-ray magnetic dichroism at the Fe L (2,3)-edges of Fe(3)O(4) |
title | Tensor description of X-ray magnetic dichroism at the Fe L
(2,3)-edges of Fe(3)O(4)
|
title_full | Tensor description of X-ray magnetic dichroism at the Fe L
(2,3)-edges of Fe(3)O(4)
|
title_fullStr | Tensor description of X-ray magnetic dichroism at the Fe L
(2,3)-edges of Fe(3)O(4)
|
title_full_unstemmed | Tensor description of X-ray magnetic dichroism at the Fe L
(2,3)-edges of Fe(3)O(4)
|
title_short | Tensor description of X-ray magnetic dichroism at the Fe L
(2,3)-edges of Fe(3)O(4)
|
title_sort | tensor description of x-ray magnetic dichroism at the fe l
(2,3)-edges of fe(3)o(4) |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7842224/ https://www.ncbi.nlm.nih.gov/pubmed/33399575 http://dx.doi.org/10.1107/S1600577520015027 |
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