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Article Dans Une Revue International Journal for Radiation Physics and Chemistry Année : 2014

Magnetic nanoconstrictions made from nickel electrodeposition in polymeric bi-conical tracks: Magneto-transport behavior

Résumé

Single nanoconstriction per magnetic wire is obtained by bi-conical track etching and electrodeposition. Magnetoresistance measurements at various angles result in irreversible jumps. Resulting jumps of magnetization have been attributed to the pinning and depinning of a constrained magnetic domain wall. a b s t r a c t In a cylindrical magnetic nanowire, a magnetic domain wall (DW) can move along the wire when an applied magnetic field or a spin-polarized current is applied. We show that in a magnetic device composed of two conical nanowires connected by a nanosized constriction, a DW can be trapped and detrapped. The magnetoreistance and the relaxation processes of the DW exhibit a specific behavior. Such a device has been fabricating by Ni electrodeposition in bi-conical tracks polymer membrane made of Swift Heavy Ions bombarded poly(VDF-co-TrFE) copolymer and poly(ethylene terephtalate) PET thin films. The latter method allows to monitor the conicity of the bi-conical wires and to give access to a panel of very well-defined structures. &

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Dates et versions

hal-01011940 , version 1 (25-06-2014)
hal-01011940 , version 2 (10-03-2015)

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M-C Clochard, M El Jouad, Nicolas Biziere, Pham Do, H-J Drouhin, et al.. Magnetic nanoconstrictions made from nickel electrodeposition in polymeric bi-conical tracks: Magneto-transport behavior. International Journal for Radiation Physics and Chemistry, 2014, pp.173910. ⟨10.1016/j.radphyschem.2013.06.016⟩. ⟨hal-01011940v2⟩
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