The magnetic properties of Co, Ni and Cox-N1-x alloy nanoparticles with different composition (0 < x < 1), prepared by the sol-gel route, were investigated. ZFC and FC magnetization measurements show that the blocking temperature increases with the Co content, while a maximum in the anisotropy constant was found for x = 0.7. Room temperature FMR measurements, suggest that in samples with larger Co content (x≥0.66) interparticle interactions play a relevant role in determining their magnetic properties
Magnetic properties of Co–Ni alloy nanoparticles prepared by the sol-gel technique
DE JULIAN FERNANDEZ, CESAR;MATTEI, GIOVANNI;MAZZOLDI, PAOLO
2004
Abstract
The magnetic properties of Co, Ni and Cox-N1-x alloy nanoparticles with different composition (0 < x < 1), prepared by the sol-gel route, were investigated. ZFC and FC magnetization measurements show that the blocking temperature increases with the Co content, while a maximum in the anisotropy constant was found for x = 0.7. Room temperature FMR measurements, suggest that in samples with larger Co content (x≥0.66) interparticle interactions play a relevant role in determining their magnetic properties
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