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Title: Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
Authors: Thomas, S.
Pookat, G.
Nair, S. S.
Daniel, M.
Dymerska, B.
Liebig, A.
Al-Harthi, S. H.
Ramanujan, Raju V.
Anantharaman, M. R.
Fidler, J.
Albrecht, Manfred
Issue Date: 2012
Source: Thomas, S., Pookat, G., Nair, S. S., Daniel, M., Dymerska, B., Liebig, A., et al. (2012). Exchange bias effect in partially oxidized amorphous Fe–Ni–B based metallic glass nanostructures. Journal of Physics: Condensed Matter, 24(25), 256004.
Series/Report no.: Journal of physics: condensed matter
Abstract: The magnetic properties of amorphous Fe–Ni–B based metallic glass nanostructures were investigated. The nanostructures underwent a spin-glass transition at temperatures below 100 K and revealed an irreversible temperature following the linear de Almeida–Thouless dependence. When the nanostructures were cooled below 25 K 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.
DOI: 10.1088/0953-8984/24/25/256004
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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