Spin-Canting and Magnetic Anisotropy in Ultrasmall CoFe2O4 Nanoparticles

PEDDIS, DAVIDE; VASQUEZ MANSILLA, MARCELO; MORUP, S.; CANNAS, C.; MUSINU, A.; PICCALUGA, G.; D'ORAZIO, F.; LUCARI, F.; FIORANI, DINO

JOURNAL OF PHYSICAL CHEMISTRY B

American Chemical Society

Lugar: Washington, DC; Año: 2008 vol. 112 p. 8507 - 8513

1089-5647

The magnetic properties of cobalt ferrite nanoparticles dispersed in a silica matrix in samples with different concentrations (5 and 10 wt % CoFe2O4) and same particle size (3 nm) were studied by magnetization, DC and AC susceptibility, and Mo¨ssbauer spectroscopy measurements. The results indicate that the particles are very weakly interacting. The magnetic properties (saturation magnetization, anisotropy constant, and spin canting)are discussed in relation to the cation distribution.