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Formation of Ferromagnetic FePt Nanoparticles by Ion Implantation

Published online by Cambridge University Press:  17 March 2011

C. W. White ,
S. P. Withrow ,
J. D. Budai ,
L. A. Boatner ,
K. D. Sorge ,
J. R. Thompson ,
K. S. Beaty  and
A. Meldrum
C. W. White
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
S. P. Withrow
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
J. D. Budai
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
L. A. Boatner
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
K. D. Sorge
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
J. R. Thompson
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
K. S. Beaty
Affiliation:
The University of Alberta, Edmonton, Alberta, Canada
A. Meldrum
Affiliation:
The University of Alberta, Edmonton, Alberta, Canada
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Abstract

Oriented ferromagnetic FePt nanoparticles with the face-centered tetragonal L10 structure were produced in Al2O3 single crystal hosts by ion implantation and annealing. Both the orientation and particle-size of the FePt particles depend strongly on the implantation conditions. The magnetic coercivities are extremely high, reaching values in excess of 20 kOe for Pt concentrations of ∼45% in the FePt alloy. Ferromagnetic FePt nanoparticles were also produced in amorphous SiO2 by ion implantation and annealing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 704: Symposium W – Nanoparticulate Materials , 2001 , W7.7.1
Copyright
Copyright © Materials Research Society 2002

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