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

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 w...

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Main 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
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/85289
http://hdl.handle.net/10220/17244
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-852892020-06-01T10:13:32Z 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, Raju V. Anantharaman, M. R. Fidler, J. Albrecht, Manfred School of Materials Science & Engineering 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. 2013-11-05T04:32:45Z 2019-12-06T16:00:57Z 2013-11-05T04:32:45Z 2019-12-06T16:00:57Z 2012 2012 Journal Article 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. https://hdl.handle.net/10356/85289 http://hdl.handle.net/10220/17244 10.1088/0953-8984/24/25/256004 en Journal of physics: condensed matter
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description 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.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
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
format Article
author 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
spellingShingle 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
Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
author_sort Thomas, S.
title Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
title_short Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
title_full Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
title_fullStr Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
title_full_unstemmed Exchange bias effect in partially oxidized amorphous Fe-Ni-B based metallic glass nanostructures
title_sort exchange bias effect in partially oxidized amorphous fe-ni-b based metallic glass nanostructures
publishDate 2013
url https://hdl.handle.net/10356/85289
http://hdl.handle.net/10220/17244
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