Surface effects in maghemite nanoparticles
authors Millan, A; Urtizberea, A; Silva, NJO; Palacio, F; Amaral, VS; Snoeck, E; Serin, V
nationality International
journal JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
author keywords nanoparticles; surface effects; saturation magnetization; maghemite; iron oxide
keywords IRON-OXIDE NANOPARTICLES; GAMMA-FE2O3 NANOPARTICLES; MAGNETIC-PROPERTIES; FERRIMAGNETIC PARTICLES; GRAINS FINS; SIZE; RELAXATION; NANOMETER; DISORDER; NEUTRON
abstract A consistent model is presented for the variation of saturation magnetization with particle size in maghemite nanoparticles, based on the existence of a magnetically disordered layer with a constant thickness of 1 nm. For particles smaller than 3 nm, layer thickness increases rapidly, and M-S is already zero for 2.5 nm particle size. Magnetization measurements have been performed oil maghemite-polymer nanocomposites with low size dispersion and a regular distribution of particles in the matrix. A representative number of samples have been studied with a diameter size in the range from 1.5 to 15 nut and +/- 10% of size dispersion. (C) 2006 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0304-8853
year published 2007
volume 312
issue 1
beginning page L5
ending page L9
digital object identifier (doi) 10.1016/j.jmmm.2006.09.011
web of science category Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000245793800002
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journal analysis (jcr 2019):
journal impact factor 2.717
5 year journal impact factor 2.723
category normalized journal impact factor percentile 54.977
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