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

Abstract

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 behaviour. 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.

Magnetoresistance in magnetic nanoconstrictions: The role of structural defects

“…12 Figure 2 shows that constrictions in the nanoscale range cannot be resolved by FESEM ( Fig. 2(b)) but these images can be extrapolated to evaluate constriction sizes ( Fig.…”

“…This study is a prolongation of previous measurements performed on larger constrictions, 11 in which the different states of the domain wall have been identified. 12 …”

Temperature Dependent Catalytic Activity of Ag/PET Ion-Track Membranes Composites

“…After dissolving of the polymer matrix in an appropriate solvent, the resulting highly ordered arrays of nanotubes (NTs) or nanowires (NWs) find extensive application in various fields of material science, including electrochemical sensing [2] and biosensing [3], nanoelectronics [4] and magnetic materials [5], medicine and biotechnology [6,7]. "As-prepared" TeMs with the embedded metal nanoparticles/NTs also could be applied as highly efficient heterogeneous catalysts for the reactions which occurred on both the membrane surface and through them [8].…”

Influence of High‐Energy Ion Irradiation on the Structural, Optical, and Chemical Properties of Polytetrafluoroethylene

“…A good amount of literature is available on the modification of structural, 1-3 chemical, 4, 5 mechanical, 6, 7 optical, [8][9][10][11] thermal, [12][13][14] magnetic, 15,16 surface, 17,18 and electrical 19 properties of the polymers by ion beam irradiation and implantation. Ion beams can effectively modify the polymeric properties.…”

“…Ion beams can effectively modify the polymeric properties. A good amount of literature is available on the modification of structural, chemical, mechanical, optical, thermal, magnetic, surface, and electrical properties of the polymers by ion beam irradiation and implantation. The extent of modification in the above‐mentioned properties depends on the structure of the polymer and nature of the incident ion parameters (charge, mass, energy, and fluence).…”