Nanomechanical torque magnetometry of an individual aggregate of ∼350 nanoparticles

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DOIResolve DOI: http://doi.org/10.1139/cjp-2014-0722
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TypeArticle
Journal titleCanadian Journal of Physics
ISSN0008-4204
1208-6045
Volume93
Issue11
Pages12521256
AbstractThe measurements of magnetic hysteresis for aggregates of nanoparticles deposited on a surface are reported. Magnetite nanoparticles derived from magnetotactic bacteria are studied using nanomechanical torque magnetometry. The nanoparticles are deposited on high-stress Si3N4 membranes, to allow inspection by electron microscopy, followed by focused ion-beam milling of torsional resonators precisely located to capture selected aggregates within the membrane area. Torque magnetometry is performed using the resonators. We investigate also the magnetic torque-driven AC resonant modes of the modified supporting membrane. The observations are compared to numerical simulations of the mechanical modes, and to micromagnetic modeling of the hysteresis of a specific measured cluster of ∼350 nanoparticles.
Publication date
PublisherNRC Research Press
LanguageEnglish
AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number23001566
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Record identifiere81f62e2-16d2-46b7-8f23-96251a43db12
Record created2017-03-07
Record modified2017-03-07
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