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Please use this identifier to cite or link to this item: http://purl.org/purl/4413

Title: Exchange bias effect in partially oxidized amorphous Fe–Ni–B based metallic glass nanostructures
Authors: Anantharaman, M R
Thomas, S
Pookat, G
Nair, S S
Daniel, M
Dymerska, B
Liebig, A
Al-Harthi, S H
Ramanujan, R V
Fidler, J
Albrecht, M
Issue Date: 25-May-2012
Publisher: IOP Publishing LTD
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
Description: J. Phys.: Condens. Matter 24 (2012) 256004 (8pp)
URI: http://dyuthi.cusat.ac.in/purl/4413
Appears in Collections:Dr. M R Anantharaman

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