Origin of reduced magnetization and domain formation in small magnetite nanoparticles

The structural, chemical, and magnetic properties of magnetite nanoparticles are compared. Aberration corrected scanning transmission electron microscopy reveals the prevalence of antiphase boundaries in nanoparticles that have significantly reduced magnetization, relative to the bulk. Atomistic mag...

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Autores principales: Nedelkoski, Zlatko, Kepaptsoglou, Demie, Lari, Leonardo, Wen, Tianlong, Booth, Ryan A., Oberdick, Samuel D., Galindo, Pedro L., Ramasse, Quentin M., Evans, Richard F. L., Majetich, Sara, Lazarov, Vlado K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5385549/
https://www.ncbi.nlm.nih.gov/pubmed/28393876
http://dx.doi.org/10.1038/srep45997
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author Nedelkoski, Zlatko
Kepaptsoglou, Demie
Lari, Leonardo
Wen, Tianlong
Booth, Ryan A.
Oberdick, Samuel D.
Galindo, Pedro L.
Ramasse, Quentin M.
Evans, Richard F. L.
Majetich, Sara
Lazarov, Vlado K.
author_facet Nedelkoski, Zlatko
Kepaptsoglou, Demie
Lari, Leonardo
Wen, Tianlong
Booth, Ryan A.
Oberdick, Samuel D.
Galindo, Pedro L.
Ramasse, Quentin M.
Evans, Richard F. L.
Majetich, Sara
Lazarov, Vlado K.
author_sort Nedelkoski, Zlatko
collection PubMed
description The structural, chemical, and magnetic properties of magnetite nanoparticles are compared. Aberration corrected scanning transmission electron microscopy reveals the prevalence of antiphase boundaries in nanoparticles that have significantly reduced magnetization, relative to the bulk. Atomistic magnetic modelling of nanoparticles with and without these defects reveals the origin of the reduced moment. Strong antiferromagnetic interactions across antiphase boundaries support multiple magnetic domains even in particles as small as 12–14 nm.
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spelling pubmed-53855492017-04-12 Origin of reduced magnetization and domain formation in small magnetite nanoparticles Nedelkoski, Zlatko Kepaptsoglou, Demie Lari, Leonardo Wen, Tianlong Booth, Ryan A. Oberdick, Samuel D. Galindo, Pedro L. Ramasse, Quentin M. Evans, Richard F. L. Majetich, Sara Lazarov, Vlado K. Sci Rep Article The structural, chemical, and magnetic properties of magnetite nanoparticles are compared. Aberration corrected scanning transmission electron microscopy reveals the prevalence of antiphase boundaries in nanoparticles that have significantly reduced magnetization, relative to the bulk. Atomistic magnetic modelling of nanoparticles with and without these defects reveals the origin of the reduced moment. Strong antiferromagnetic interactions across antiphase boundaries support multiple magnetic domains even in particles as small as 12–14 nm. Nature Publishing Group 2017-04-10 /pmc/articles/PMC5385549/ /pubmed/28393876 http://dx.doi.org/10.1038/srep45997 Text en Copyright © 2017, The Author(s) 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
Nedelkoski, Zlatko
Kepaptsoglou, Demie
Lari, Leonardo
Wen, Tianlong
Booth, Ryan A.
Oberdick, Samuel D.
Galindo, Pedro L.
Ramasse, Quentin M.
Evans, Richard F. L.
Majetich, Sara
Lazarov, Vlado K.
Origin of reduced magnetization and domain formation in small magnetite nanoparticles
title Origin of reduced magnetization and domain formation in small magnetite nanoparticles
title_full Origin of reduced magnetization and domain formation in small magnetite nanoparticles
title_fullStr Origin of reduced magnetization and domain formation in small magnetite nanoparticles
title_full_unstemmed Origin of reduced magnetization and domain formation in small magnetite nanoparticles
title_short Origin of reduced magnetization and domain formation in small magnetite nanoparticles
title_sort origin of reduced magnetization and domain formation in small magnetite nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5385549/
https://www.ncbi.nlm.nih.gov/pubmed/28393876
http://dx.doi.org/10.1038/srep45997
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