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Exchange bias anisotropy in Co nanowires electrodeposited into polycarbonate membranes

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Medina, Joaquin De La Torre [UCL] Darques, Michaël [UCL] Piraux, Luc [UCL]

We report on exchange bias effects and time evolution in Co nanowires electrodeposited into the pores of track etched polycarbonate membranes. The slow variation of the exchange bias anisotropy, as extracted from field cooled hysteresis loops, is due to the delayed in time oxidation of the nanowires embedded in the polymer template. A model has been proposed to account for the drop of magnetization due to the presence of an oxide layer at the periphery of the nanowires, within the nanowires/polymer interface. The measured exchange bias energy is about four times smaller than the energy in planar bilayers because of the cylindrical geometry of the wires. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3183949]

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2009
Language Anglais
Journal information "Journal of Applied Physics" - Vol. 106, no. 2 (2009)
Peer reviewed yes
Publisher Amer Inst Physics (Melville)
issn 0021-8979
e-issn 1089-7550
Publication status Publié
Affiliation UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
Links
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Bibliographic reference Medina, Joaquin De La Torre ; Darques, Michaël ; Piraux, Luc. Exchange bias anisotropy in Co nanowires electrodeposited into polycarbonate membranes. In: Journal of Applied Physics, Vol. 106, no. 2 (2009)
Permanent URL http://hdl.handle.net/2078.1/35425