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Correlating uncompensated antiferromagnetic moments and exchange coupling interactions in interface ion-beam bombarded Co90Fe 10/CoFe-oxide bilayers

Journal Article


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Abstract


  • The coercivity and exchange bias field of ferro-/antiferromagnetic Co 90Fe10/CoFe-oxide bilayers were studied as function of the surface morphology of the bottom CoFe-oxide layer. The CoFe-oxide surface structure was varied systematically by low energy (0-70 V) Argon ion-beam bombardment before subsequent deposition of the Co90Fe10 layer. Transmission electron microscopy results showed that the bilayer consisted of hcp Co90Fe10 and rock-salt CoFe-oxide. At low temperatures, enhanced coercivities and exchange bias fields with increasing ion-beam bombardment energy were observed, which are attributed to defects and uncompensated moments created near the CoFe-oxide surface in increasing amounts with larger ion-beam bombardment energies. Magnetometry results also showed an increasing divergence of the low field temperature dependent magnetization [ΔM(T)] between field-cooling and zero-field-cooling processes, and an increasing blocking temperature with increasing ion-beam bombardment energy. © 2012 The Japan Society of Applied Physics.

UOW Authors


  •   Shueh, Chin (external author)
  •   Chen, Pei-Shi (external author)
  •   Cortie, David
  •   Klose, Frank (external author)
  •   Prof. Wen Chen, Wen (external author)
  •   Wu, T H. (external author)
  •   Van Lierop, Johan (external author)
  •   Lin, Ko-Wei (external author)

Publication Date


  • 2012

Citation


  • Shueh, C., Chen, P., Cortie, D., Klose, F., Chen, W., Wu, T. H., Van Lierop, J. & Lin, K. (2012). Correlating uncompensated antiferromagnetic moments and exchange coupling interactions in interface ion-beam bombarded Co90Fe 10/CoFe-oxide bilayers. Japanese Journal of Applied Physics, 51 (11), 11PG02-1-11PG02-4.

Scopus Eid


  • 2-s2.0-84871366160

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1262&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/257

Start Page


  • 11PG02-1

End Page


  • 11PG02-4

Volume


  • 51

Issue


  • 11

Abstract


  • The coercivity and exchange bias field of ferro-/antiferromagnetic Co 90Fe10/CoFe-oxide bilayers were studied as function of the surface morphology of the bottom CoFe-oxide layer. The CoFe-oxide surface structure was varied systematically by low energy (0-70 V) Argon ion-beam bombardment before subsequent deposition of the Co90Fe10 layer. Transmission electron microscopy results showed that the bilayer consisted of hcp Co90Fe10 and rock-salt CoFe-oxide. At low temperatures, enhanced coercivities and exchange bias fields with increasing ion-beam bombardment energy were observed, which are attributed to defects and uncompensated moments created near the CoFe-oxide surface in increasing amounts with larger ion-beam bombardment energies. Magnetometry results also showed an increasing divergence of the low field temperature dependent magnetization [ΔM(T)] between field-cooling and zero-field-cooling processes, and an increasing blocking temperature with increasing ion-beam bombardment energy. © 2012 The Japan Society of Applied Physics.

UOW Authors


  •   Shueh, Chin (external author)
  •   Chen, Pei-Shi (external author)
  •   Cortie, David
  •   Klose, Frank (external author)
  •   Prof. Wen Chen, Wen (external author)
  •   Wu, T H. (external author)
  •   Van Lierop, Johan (external author)
  •   Lin, Ko-Wei (external author)

Publication Date


  • 2012

Citation


  • Shueh, C., Chen, P., Cortie, D., Klose, F., Chen, W., Wu, T. H., Van Lierop, J. & Lin, K. (2012). Correlating uncompensated antiferromagnetic moments and exchange coupling interactions in interface ion-beam bombarded Co90Fe 10/CoFe-oxide bilayers. Japanese Journal of Applied Physics, 51 (11), 11PG02-1-11PG02-4.

Scopus Eid


  • 2-s2.0-84871366160

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1262&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/257

Start Page


  • 11PG02-1

End Page


  • 11PG02-4

Volume


  • 51

Issue


  • 11