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Nanoparticles of metallic Cobalt and Nickel prepared by ionimplantation into SiO2

Published online by Cambridge University Press:  17 March 2011

O. Cíntora-González ,
C. Estournès ,
D. Muller ,
M. Richard-Plouet ,
A. Traverse ,
J. L. Guille  and
J.J. Grob
O. Cíntora-González
Affiliation:
Groupe des Matériaux Inorganiques Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504 CNRS-ULP-ECPM) 23 rue du Loess 67037 Strasbourg Cedex, France Laboratoire PHASE (UPR292 CNRS), 23 rue du Loess 67037 Strasbourg, France
C. Estournès
Affiliation:
Groupe des Matériaux Inorganiques Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504 CNRS-ULP-ECPM) 23 rue du Loess 67037 Strasbourg Cedex, France
D. Muller
Affiliation:
Laboratoire PHASE (UPR292 CNRS), 23 rue du Loess 67037 Strasbourg, France
M. Richard-Plouet
Affiliation:
Groupe des Matériaux Inorganiques Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504 CNRS-ULP-ECPM) 23 rue du Loess 67037 Strasbourg Cedex, France
A. Traverse
Affiliation:
Lure (UMR130 CNRS), Bâtiment 209A, Université de Paris-Sud, 91405 Orsay Cedex, France
J. L. Guille
Affiliation:
Groupe des Matériaux Inorganiques Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504 CNRS-ULP-ECPM) 23 rue du Loess 67037 Strasbourg Cedex, France
J.J. Grob
Affiliation:
Laboratoire PHASE (UPR292 CNRS), 23 rue du Loess 67037 Strasbourg, France
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Abstract

The structural and magnetic properties of nano-sized particles of transitionmetals (Co and Ni) implanted into amorphous SiO2 areinvestigated. The SiO2 substrates used were as grown on a silicon(100) wafer under wet O2 atmosphere. The metals were implanted assingly charged atoms energized to 30 or 160 keV. Transmission Electronmicroscopy (TEM) observations and X-ray absorption spectroscopy (XAS) showthat M+ implantation results in the formation of metallicnanoparticles at the vicinity of the surface whereas oxide particles (< 1nm) are formed in a deeper region. After thermal treatment under hydrogen,TEM evidences the disappearance of the oxide region and an increase in thesize of the metallic particle. XAS shows that cobalt and nickel are entirelyin the metallic form and saturation magnetization becomes close to thetheoretical value.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 647: Symposium O – Ion Beam Synthesis & Processing of Advanced Materials , 2000 , O5.12
Copyright
Copyright © Materials Research Society 2001

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