Matrix and interaction effects on the magnetic properties of Co nanoparticles embedded in gold and vanadium

• DOI: 10.1039/c2cp42769a
• Publication Date: 2012-11-02T13:32:11Z
• Authors: M. Ruano; M. Díaz; L. Martínez; E. Navarro; E. Román; M. García-Hernandez; A. Espinosa; C. Ballesteros; R. Fermento; Y. Huttel
• Keywords: Matrix (chemical analysis)

The study of the magnetic properties Co nanoparticles (with an average diameter 10.3 nm) grown using a gas-phase aggregation source and embedded in Au V matrices is presented. We investigate how matrix, number (counted by coverage percentage), interparticle interactions complex nanoparticles/matrix interface structure define studied systems. A threshold 3.5% monolayer was found both systems: below this coverage, behave as assembly independent single-domain entities with uniaxial anisotropy. Above it that behavior systems more matrix dependent. While relaxation Henkel plots measurements stress importance dipolar formation coherent clusters case cobalt vanadium explained through spin glass-like state at V-Co screens between NPs.