Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1805175 | Journal of Magnetism and Magnetic Materials | 2007 | 5 Pages |
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 MS is already zero for 2.5 nm particle size. Magnetization measurements have been performed on 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 nm and ±10% of size dispersion.
Related Topics
Physical Sciences and Engineering
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Condensed Matter Physics
Authors
A. Millan, A. Urtizberea, N.J.O. Silva, F. Palacio, V.S. Amaral, E. Snoeck, V. Serin,