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|Title:||Structural and magnetic properties of Co nanoparticles in Cu/SiO₂ matrix|
|Authors:||Kumar, P Anil|
Magnetocrystalline anisotropy constant
|Abstract:||The magnetic properties of Co nanoparticles embedded in SiO₂ and Cu matrices separately, have been presented in the paper. The size of the cobalt nanoparticles is varied between 15-35 nm. Co forms a usual hcp structure in SiO₂ matrix whereas it forms fcc structure when embedded in Cu matrix. This fact is also supported by the higher coercivity of Co nanoparticles in SiO₂ matrix. A large coercivity value (~ 855 Oe) for Co nanoparticles embedded in SiO₂ matrix and considerably high value (~ 465 Oe) for Co nanoparticles embedded in Cu matrix have been reported. The Law of Approach to Saturation is used in the case of Co-Cu composite to calculate the magnetocrystalline anisotropy constant and saturation magnetization.|
|Appears in Collections:||IJPAP Vol.45(01) [January 2007]|
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