Origin of reduced magnetization and domain formation in small magnetite nanoparticles

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URI: http://hdl.handle.net/10498/33936

DOI: 10.1038/SREP45997

ISSN: 2045-2322

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Author/s
Nedelkoski, Zlatko; Kepaptsoglou, Demie; Lari, Leonardo; Wen, Tianlong; Booth, Ryan A.; Oberdick, Samuel D.; Galindo Riaño, Pedro LuisAuthority UCA; Ramasse, Quentin M.; Evans, Richard F. L.; Majetich, Sara; Lazarov, Vlado K.
Date
2017
Department
Ingeniería Informática
Source
Scientific Reports - 2017, Vol. 7 pp. 1-8
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.
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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
This work is under a Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 Internacional