@misc{10498/35266,
year = {2010},
month = {9},
url = {http://hdl.handle.net/10498/35266},
abstract = {An increasing number of promising applications for future technology is arising from size constraints in nanoparticles (NPs) and from the chemical manipulation of their surfaces. In this work, we analyse the finite-size and surface effects on polyacrylic acid-coated Fe3O4 NPs and oleic acid-coated γ-Fe2O3 NPs by studying their magnetization curves at different temperatures. The measured thermal dependence of the saturation magnetization is no longer explained by the typical T3/2 Bloch law, yielding higher values than those expected for its exponent. When incorporated in polymeric matrixes to form magnetic transparent nanocomposites, the oleic acid-coated γ-Fe2O3 NPs also deviate from Bloch’s law, but following the opposite trend observed in free coated NPs.},
keywords = {maghemite},
keywords = {magnetite},
keywords = {Bloch's law},
keywords = {superparamagnetism},
title = {Size and surface effects in the magnetic properties of maghemite and magnetite coated nanoparticles},
doi = {10.1098/rsta.2010.0172},
author = {Ortega Ponce, Daniel and Velez-Fort, Emilio and García, D. A. and García, Ramón and Litrán Ramos, Rocío and Barrera-Solano, M. Carmen and Ramírez del Solar, Milagrosa and Domínguez de la Vega, Manuel},
}