Synthesis and magnetic reversal of bi-conical Ni nanostructures

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3638072· OSTI ID:22038711

Biziere, N ^[1]; Lassalle Ballier, R; Viret, M ^[2]; Clochard, M C; Wade, T L; Wegrowe, J E ^[1]; Balanzat, E ^[3]

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1. Laboratoire des Solides Irradies, CEA/CNRS/Ecole Polytechnique, Ecole Polytechnique, 91128 Palaiseau Cedex (France)
2. Service de Physique de l'Etat Condense, DSM/IRAMIS/SPEC, CEA Saclay URA CNRS 2464, 91191 Gif-Sur-Yvette Cedex (France)
3. CIMAP, Unite Mixte CEA-CNRS-ENSICAEN, F-14070 Caen Cedex 5 (France)

Template synthesis in polyethylene terephthalate (PET) membranes has been used to grow hour glass shaped nickel nanowires with a constriction in the range of tens of nanometers at the center. Anisotropic magnetoresistance measurements have been performed on a single nanowire to follow magnetization reversal of the structure. The results are explained via 3D micromagnetic simulations showing the appearance of a complex vortex state close to the constriction whose propagation depends on the angle between the cone axis and the applied field. The interest of this original growth process for spintronics is discussed.

• OSTI ID: 22038711
• Journal Information: Journal of Applied Physics, Vol. 110, Issue 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
CRYSTAL GROWTH
CRYSTAL STRUCTURE
GLASS
MAGNETIC FIELD REVERSAL
MAGNETIZATION
MAGNETORESISTANCE
MEMBRANES
NICKEL
POLYESTERS
QUANTUM WIRES
SYNTHESIS
VORTICES