Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures

S. Thomas, G. Pookat, S. S. Nair, M. Daniel, B. Dymerska, A. Liebig, S. H. Al-Harthi, R. V. Ramanujan, M. R. Anantharaman, J. Fidler, M. Albrecht

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The magnetic properties of amorphous FeNiB based metallic glass nanostructures were investigated. The nanostructures underwent a spin-glass transition at temperatures below 100K and revealed an irreversible temperature following the linear de AlmeidaThouless dependence. When the nanostructures were cooled below 25K in a magnetic field, they exhibited an exchange bias effect with enhanced coercivity. The observed onset of exchange bias is associated with the coexistence of the spin-glass phase along with the appearance of another spin-glass phase formed by oxidation of the structurally disordered surface layer, displaying a distinct training effect and cooling field dependence. The latter showed a maximum in exchange bias field and coercivity, which is probably due to competing multiple equivalent spin configurations at the boundary between the two spin-glass phases.

Original languageEnglish
Article number256004
JournalJournal of Physics: Condensed Matter
Volume24
Issue number25
DOIs
Publication statusPublished - Jun 27 2012

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Spin glass
Metallic glass
metallic glasses
spin glass
Nanostructures
Coercive force
coercivity
Glass transition
Magnetic properties
surface layers
education
Magnetic fields
magnetic properties
Cooling
cooling
Oxidation
Temperature
oxidation
temperature
configurations

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Thomas, S., Pookat, G., Nair, S. S., Daniel, M., Dymerska, B., Liebig, A., ... Albrecht, M. (2012). Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures. Journal of Physics: Condensed Matter, 24(25), [256004]. https://doi.org/10.1088/0953-8984/24/25/256004

Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures. / Thomas, S.; Pookat, G.; Nair, S. S.; Daniel, M.; Dymerska, B.; Liebig, A.; Al-Harthi, S. H.; Ramanujan, R. V.; Anantharaman, M. R.; Fidler, J.; Albrecht, M.

In: Journal of Physics: Condensed Matter, Vol. 24, No. 25, 256004, 27.06.2012.

Research output: Contribution to journalArticle

Thomas, S, Pookat, G, Nair, SS, Daniel, M, Dymerska, B, Liebig, A, Al-Harthi, SH, Ramanujan, RV, Anantharaman, MR, Fidler, J & Albrecht, M 2012, 'Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures', Journal of Physics: Condensed Matter, vol. 24, no. 25, 256004. https://doi.org/10.1088/0953-8984/24/25/256004
Thomas, S. ; Pookat, G. ; Nair, S. S. ; Daniel, M. ; Dymerska, B. ; Liebig, A. ; Al-Harthi, S. H. ; Ramanujan, R. V. ; Anantharaman, M. R. ; Fidler, J. ; Albrecht, M. / Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures. In: Journal of Physics: Condensed Matter. 2012 ; Vol. 24, No. 25.
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