INTECIN 20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
artículos
Título:
Synthesis of AgCoFe2O4 dimer colloidal nanoparticles and enhancement of their magnetic response
Autor/es:
S. K. SHARMA; G. LOPES; J. M. VARGAS; L. M. SOCOLOVSKY; K. R. PIROTA; M. KNOBEL
Revista:
JOURNAL OF APPLIED PHYSICS
Editorial:
AMER INST PHYSICS
Referencias:
Año: 2011 vol. 109 p. 1 - 3
ISSN:
0021-8979
Resumen:
This paper reports the structural and magnetic properties of AgCoFe2O4 colloidal dimernanoparticles (NPs) synthesized using a two-step solution-phase route. Ag NPs were used as seedsto grow AgCoFe2O4 dimer NPs using thermal decomposition of metallic precursor. By means oftemperature and field dependent dc magnetization measurements, it is found that the silver due toits interface with CoFe2O4 particles leads to thermal stabilization of the dimer NPs superior ascompared to CoFe2O4 alone. Our results show enhancement of the magnetic anisotropy and a largecoercivity at 2 K for dimer NPs, which could be ascribed to interface effect between Ag andCoFe2O4 components and the related structural defects
