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Origin of reduced magnetization and domain formation in small magnetite nanoparticles

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JournalScientific Reports
DateAccepted/In press - 7 Mar 2017
DatePublished (current) - 10 Apr 2017
Volume7
Number of pages8
Original languageEnglish

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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© The Author(s) 2017.

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  • Journal Article

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