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Inter-particle and interfacial interaction of magnetic nanoparticles

Cited 13 time in Web of Science Cited 14 time in Scopus
Issue Date
2007-03
Citation
Journal of Magnetism and Magnetic Materials, Vol.310 No.2, pp.E806-E808
Keywords
magnetic nanoparticlesuperparamagnetisminter-particle interactioninterfacial interaction
Abstract
In order to understand inter-particle as well as interfacial interaction of magnetic nanoparticles, we have prepared several Fe3O4 nanoparticles in the ranges from 3 to 50 nm. These nanoparticles are particularly well characterized in terms of size distribution with a standard deviation (sigma) in size less than 0.4 nm. We investigated the inter-particle interaction by measuring the magnetic properties of the nanoparticles while controlling inter-particle distances by diluting the samples with solvents. According to this study, blocking temperatures dropped by 8-17 K with increasing the inter-particle distances from a few nm to 140 nm while the overall shape and qualitative behavior of the magnetization remain unchanged. It implies that most features observed in the magnetic properties of the nanoparticles are due to the intrinsic properties of the nanoparticles, not due to the inter-particle interaction. We then examined possible interfacial magnetic interaction in the core-shell structure of our Fe3O4 nanoparticles. (C) 2006 Elsevier B.V. All rights reserved.
ISSN
0304-8853
URI
https://hdl.handle.net/10371/165899
DOI
https://doi.org/10.1016/j.jmmm.2006.10.746
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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