Origin of reduced magnetization and domain formation in small magnetite nanoparticles

Abstract

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.

Metadata

Authors/Creators:	Nedelkoski, Zlatko Kepaptsoglou, Demie https://orcid.org/0000-0003-0499-0470 Lari, Leonardo https://orcid.org/0000-0002-1446-2877 Wen, Tianlong Booth, Ryan A. Oberdick, Samuel D. Galindo, Pedro L. Ramasse, Quentin M Evans, Richard F L https://orcid.org/0000-0002-2378-8203 Majetich, Sara Lazarov, Vlado K https://orcid.org/0000-0002-4314-6865
Copyright, Publisher and Additional Information:	© The Author(s) 2017.
Keywords:	Journal Article
Dates:	Accepted: 7 March 2017 Published: 10 April 2017
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Physics (York)
Depositing User:	Pure (York)
Date Deposited:	26 Apr 2017 12:00
Last Modified:	06 Dec 2023 11:50
Published Version:	https://doi.org/10.1038/srep45997
Status:	Published
Refereed:	Yes
Identification Number:	https://doi.org/10.1038/srep45997
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