|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.45 [2007] >
IJPAP Vol.45(01) [January 2007] >
| Title: | Structural and magnetic properties of Co nanoparticles in Cu/SiO₂ matrix |
| Authors: | Kumar, P Anil
Mitra, Subarna
Mandal, Kalyan |
| Keywords: | Co nanoparticles
Cu/SiO₂ matrix
Magnetic properties
Magnetocrystalline anisotropy constant |
| Issue Date: | Jan-2007 |
| Publisher: | CSIR |
| IPC Code: | H01F41/30 |
| 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. |
| Page(s): | 21-26 |
| ISSN: | 0019-5596 |
| Source: | IJPAP Vol.45(01) [January 2007]
|
|
