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

M.C. Clochard (1) , M. El Jouad (1) , Nicolas Biziere (2) , Pham Do Chung (1) , H. -J. Drouhin (1) , E. Balanzat (3) , Didier Lairez (4) , M. Viret (5) , J. -E. Wegrowe (1)

1 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
2 CEMES - Centre d'élaboration de matériaux et d'études structurales
3 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
4 LLB - UMR 12 - Laboratoire Léon Brillouin
5 SPEC - UMR3680 - Service de physique de l'état condensé

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. (C) 2013 Elsevier Ltd. All rights reserved.

Domaines: Mécanique [physics.med-ph]

M.C. Clochard, M. El Jouad, Nicolas Biziere, Pham Do Chung, H. -J. Drouhin, et al.. Magnetic nanoconstrictions made from nickel electrodeposition in polymeric bi-conical tracks: Magneto-transport behavior. Radiation Physics and Chemistry, 2014, 94, pp.66-71. ⟨10.1016/j.radphyschem.2013.06.016⟩. ⟨hal-01011940v1⟩