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Evolution of the structure and magneto-optical properties of ion beam synthesized iron nanoclusters

Journal Article


Abstract


  • Abstract Changes in the structural, magnetic, and optical

    properties are observed during the synthesis of metallic

    nanoclusters fabricated on the surface of a thin silica layer

    by ion beam implantation of iron atoms. Iron atoms were

    implanted to the fluence of 1016 cm-2. The ion implantation

    depth in 400-nm thick SiO2 film on a Si (100) substrate

    was 25 nm. The implanted samples were subsequently

    annealed for periods of seconds to hours at 1000 C with

    Electron Beam Annealing. Ellipsometry and Rutherford

    Backscattering Spectrometry spectra were fitted with

    appropriate models to retrieve the optical characteristics,

    composition, and structure of the samples. Magneto Optical

    Kerr Effect measurements and SQUID magnetometry

    were performed to investigate the effect of the structural

    changes identified by TEM measurements on the superparamagnetic

    and magneto-optical properties of the

    samples during the annealing process. The changes in the

    Fe crystalline(core)/amorphous oxide(shell) structure and

    the position of the nanoclusters relative to the surface

    observed for small annealing durations are shown to

    enhance the Kerr effect resulting into high coercive field

    and high amplitude in the Kerr rotation and ellipticity.

UOW Authors


  •   Kennedy, John (external author)
  •   Leveneur, Jerome (external author)
  •   Takeda, Y (external author)
  •   Williams, G V M. (external author)
  •   Mitchell, David
  •   Markwitz, Andreas (external author)
  •   Metson, James B. (external author)

Publication Date


  • 2012

Citation


  • Kennedy, J., Leveneur, J., Takeda, Y., Williams, G. V. M., Mitchell, D. R. G., Markwitz, A. & Metson, J. B. (2012). Evolution of the structure and magneto-optical properties of ion beam synthesized iron nanoclusters. Journal of Materials Science, 47 (3), 1127-1134.

Scopus Eid


  • 2-s2.0-84855473017

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/861

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 1127

End Page


  • 1134

Volume


  • 47

Issue


  • 3

Place Of Publication


  • United States

Abstract


  • Abstract Changes in the structural, magnetic, and optical

    properties are observed during the synthesis of metallic

    nanoclusters fabricated on the surface of a thin silica layer

    by ion beam implantation of iron atoms. Iron atoms were

    implanted to the fluence of 1016 cm-2. The ion implantation

    depth in 400-nm thick SiO2 film on a Si (100) substrate

    was 25 nm. The implanted samples were subsequently

    annealed for periods of seconds to hours at 1000 C with

    Electron Beam Annealing. Ellipsometry and Rutherford

    Backscattering Spectrometry spectra were fitted with

    appropriate models to retrieve the optical characteristics,

    composition, and structure of the samples. Magneto Optical

    Kerr Effect measurements and SQUID magnetometry

    were performed to investigate the effect of the structural

    changes identified by TEM measurements on the superparamagnetic

    and magneto-optical properties of the

    samples during the annealing process. The changes in the

    Fe crystalline(core)/amorphous oxide(shell) structure and

    the position of the nanoclusters relative to the surface

    observed for small annealing durations are shown to

    enhance the Kerr effect resulting into high coercive field

    and high amplitude in the Kerr rotation and ellipticity.

UOW Authors


  •   Kennedy, John (external author)
  •   Leveneur, Jerome (external author)
  •   Takeda, Y (external author)
  •   Williams, G V M. (external author)
  •   Mitchell, David
  •   Markwitz, Andreas (external author)
  •   Metson, James B. (external author)

Publication Date


  • 2012

Citation


  • Kennedy, J., Leveneur, J., Takeda, Y., Williams, G. V. M., Mitchell, D. R. G., Markwitz, A. & Metson, J. B. (2012). Evolution of the structure and magneto-optical properties of ion beam synthesized iron nanoclusters. Journal of Materials Science, 47 (3), 1127-1134.

Scopus Eid


  • 2-s2.0-84855473017

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/861

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 1127

End Page


  • 1134

Volume


  • 47

Issue


  • 3

Place Of Publication


  • United States