Magnetic properties of Ni nanoparticles dispersed in silica prepared by high-energy ball millingE. M. González, M. I. Montero, F. Cebollada, C. de Julián, J. L. Vicent and J. M. GonzálezEurophys. Lett., 42 1 (1998) 91-96DOI: https://doi.org/10.1209/epl/i1998-00557-x