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Modulating the magneto-crystalline anisotropy and the exchange bias field in CoFe/(Co,Fe)O bilayers using ion-beam bombardment and single crystalline substrates

Journal Article


Abstract


  • We report the effects of ion-beam bombardment on the room temperature and low temperature magnetic properties of ferromagnetic CoFe/antiferromagnetic (Co,Fe)O thin film bilayers. The films were deposited onto amorphous SiO2 and single crystalline MgO (110)/(100) substrates. Magnetometry showed that ion-beam bombardment was capable of modifying the coercivity and loop shape for the thin film system at room temperature, corresponding to alteration of the effective magneto-crystalline anisotropy field. After field cooling to 50 K, a shifted hysteresis loop was seen for those films containing a proportion of the antiferromagnetic rock-salt (Co,Fe)O phase, with an exchange bias magnitude that depended on the ion-beam bombardment conditions. Our results indicate that matching the substrate with appropriate ion-bombardment conditions provides a promising way to engineer selectively two important types of magnetic anisotropy in ferromagnetic/antiferromagnetic bilayers: magneto-crystalline and exchange bias.

UOW Authors


  •   Shueh, Chin (external author)
  •   Cortie, David
  •   Klose, Frank (external author)
  •   Van Lierop, Johan (external author)
  •   Lin, Ko-Wei (external author)

Publication Date


  • 2012

Citation


  • Shueh, C., Cortie, D., Klose, F., van Lierop, J. & Lin, K. (2012). Modulating the magneto-crystalline anisotropy and the exchange bias field in CoFe/(Co,Fe)O bilayers using ion-beam bombardment and single crystalline substrates. IEEE Transactions on Magnetics, 48 (11), 2892-2895.

Scopus Eid


  • 2-s2.0-84867761221

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/352

Number Of Pages


  • 3

Start Page


  • 2892

End Page


  • 2895

Volume


  • 48

Issue


  • 11

Abstract


  • We report the effects of ion-beam bombardment on the room temperature and low temperature magnetic properties of ferromagnetic CoFe/antiferromagnetic (Co,Fe)O thin film bilayers. The films were deposited onto amorphous SiO2 and single crystalline MgO (110)/(100) substrates. Magnetometry showed that ion-beam bombardment was capable of modifying the coercivity and loop shape for the thin film system at room temperature, corresponding to alteration of the effective magneto-crystalline anisotropy field. After field cooling to 50 K, a shifted hysteresis loop was seen for those films containing a proportion of the antiferromagnetic rock-salt (Co,Fe)O phase, with an exchange bias magnitude that depended on the ion-beam bombardment conditions. Our results indicate that matching the substrate with appropriate ion-bombardment conditions provides a promising way to engineer selectively two important types of magnetic anisotropy in ferromagnetic/antiferromagnetic bilayers: magneto-crystalline and exchange bias.

UOW Authors


  •   Shueh, Chin (external author)
  •   Cortie, David
  •   Klose, Frank (external author)
  •   Van Lierop, Johan (external author)
  •   Lin, Ko-Wei (external author)

Publication Date


  • 2012

Citation


  • Shueh, C., Cortie, D., Klose, F., van Lierop, J. & Lin, K. (2012). Modulating the magneto-crystalline anisotropy and the exchange bias field in CoFe/(Co,Fe)O bilayers using ion-beam bombardment and single crystalline substrates. IEEE Transactions on Magnetics, 48 (11), 2892-2895.

Scopus Eid


  • 2-s2.0-84867761221

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/352

Number Of Pages


  • 3

Start Page


  • 2892

End Page


  • 2895

Volume


  • 48

Issue


  • 11