Surface effects in maghemite nanoparticles
By Á. Millán, A. Urtizberea, N. Silva, F. Palacio, V. Amaral, E. Snoeck, V. Serin. 2007
196 citations recorded by the source corpus.
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 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.
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/b1d62e22835e58c58830a67581afbda65acced16
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Citations in the corpus
- Magnetic Nanoparticles: Surface Effects and Properties Related to Biomedicine Applications (2013, background): “accepted theoretical model to explain some magnetic properties such as the decrease of magnetization of nanoparticles (compared with that of the bulk material) is based on a bulk-like ferromagnetic core and a shell composed of disordered moments [55,56].”