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Lari, Leonardo
University of York
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2024Origin of reduced magnetization and domain formation in small magnetite nanoparticlescitations
- 2022Environmental STEM Study of the Oxidation Mechanism for Iron and Iron Carbide Nanoparticlescitations
- 2017Origin of reduced magnetization and domain formation in small magnetite nanoparticlescitations
- 2017Spatially resolved variations in reflectivity across iron oxide thin filmscitations
- 2016Polar Spinel-Perovskite Interfacescitations
- 2016Atomic and electronic structure of twin growth defects in magnetitecitations
- 2010Electron microscopy of AlGaN-based multilayers for UV laser devices
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article
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.