Fused silica plates were implanted with Co ions at room temperature at the energy of 50 keV and to the fluence of 4×1016ionscm-2. The formation of metal nanoclusters was observed by transmission electron microscopy. The cluster size distribution is narrow with a mean-diameter value of about 3 nm. Atomic in-depth distribution was determined by Rutherford backscattering spectrometry, whereas the cobalt chemical state was characterized by electron spectroscopies. Nonlinear refractive index n2is of the order of 0.2cm2GW-1, as determined by the Z-scan technique at a wavelength of 770 nm for 130 fs long pulses at a 76 MHz repetition rate. Zero-field-cooled and field-cooled magnetization curves at the liquid-helium temperature exhibit features of superparamagnetic behavior that are characteristic of assemblies of single-domain nanoparticles. © 1998 American Institute of Physics.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
Cattaruzza, E., Gonella, F., Mattei, G., Mazzoldi, P., Gatteschi, D., Sangregorio, C., ... Battaglin, G. (1998). Cobalt nanoclusters in silica glass: Nonlinear optical and magnetic properties. Applied Physics Letters, 73(9), 1176 - 1178. https://doi.org/10.1063/1.122120