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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2014
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46431122006 |
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Table of Contents:
- Magnetic Properties of Dipolar Chains in Ferrofluids I. Avgin D. L. Huber Física, Astronomía y Matemáticas Dipolar chains Dipolar chains Dipolar chains Dipolar chains Dipolar chains We have investigated the dipole interaction energies per particle and the local dipole field distributions in a frozen- magnetization model of a ferrofluid chain in a saturating mag- netic field. A lognormal distribution of particle diameters was assumed. The interaction energies were calculated for one- dimensional arrays of dipoles with moments parallel to the chain. We have computed the energies by various approxima- tions related to the hard sphere particle diameter distribution. A similar approach was followed for the local field distributions. It was found that the energy per particle and mean local field were largely determined by the mean particle diameter, but the distribution of local fields was sensitive to both the mean diameter and the assumptions about spatial correlations be- tween particles of different size. Detailed results are presented for water-soluble Fe3O4/PAA (polyacrylic acid). 2014 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46431122006 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2-3 Vol.44