The Magnetic Properties of Metal-Alloy Glass Composites Prepared by Ion Implantation

Journal Article · Tue Aug 26 00:00:00 EDT 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1619805· OSTI ID:20634198

Julian Fernandez, Cesar de; Mattei, Giovanni; Sada, Cinzia; Maurizio, Chiara; Padovani, Sara; Mazzoldi, Paolo ^[1]; Sangregorio, Claudio; Gatteschi, Dante ^[2]

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1. I.N.F.M. - Dip. of Physics , University of Padova. Via Marzolo 8, Padova 35124 (Italy)
2. L.A.M.M., University of Firenze, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019 (Italy)

The structural and magnetic properties of Co-Ni, Co-Fe and Ni-Cu alloy nanoparticles formed in silica matrix by sequential ion implantation are presented. These nanoparticles show crystal structure similar to the corresponding bulk alloys. In the Co-Ni and Co-Fe, magnetization saturation and coercive field depend on the the alloy composition, crystal structure and size effects. Ferromagnetic resonance studies show that collective magnetic processes are present and these are determined by the film-like morphology of the implanted region. The temperature dependence of the magnetization of the NixCu100-x samples indicates that their Curie Temperatures are larger than the corresponding bulk ones. This feature is discussed considering the composition of the nanoparticles and the size effects.

• OSTI ID: 20634198
• Journal Information: AIP Conference Proceedings, Vol. 680, Issue 1; Conference: 17. international conference on the application of accelerators in research and industry, Denton, TX (United States), 12-16 Nov 2002; Other Information: DOI: 10.1063/1.1619805; (c) 2003 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COBALT ALLOYS
COMPOSITE MATERIALS
COPPER ALLOYS
CRYSTAL STRUCTURE
CURIE POINT
FERROMAGNETIC RESONANCE
ION IMPLANTATION
IRON ALLOYS
MAGNETIC PROPERTIES
MAGNETIZATION
METALLIC GLASSES
MORPHOLOGY
NANOSTRUCTURES
NICKEL ALLOYS
SILICA
TEMPERATURE DEPENDENCE
THIN FILMS