Premium
Template‐assisted Co–Ni alloys and multisegmented nanowires with tuned magnetic anisotropy
Author(s) -
García Javier,
Vega Victor,
Iglesias Lucia,
Prida Victor M.,
Hernando Blanca,
BarrigaCastro Enrique D.,
MendozaReséndez Raquel,
Luna Carlos,
Görlitz Detlef,
Nielsch Kornelius
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201300731
Subject(s) - nanowire , materials science , alloy , hysteresis , magnetic hysteresis , anisotropy , magnetic anisotropy , magnetization , homogeneous , nanotechnology , magnetic field , condensed matter physics , composite material , optics , thermodynamics , physics , quantum mechanics
Homogeneous Co 85 Ni 15 and Co 54 Ni 46 alloys, together multisegmented Co 85 Ni 15 /Co 54 Ni 46 magnetic nanowire arrays have been synthesized by means of potentiostatic and pulsed potentiostatic electrodeposition techniques, respectively, into the pores of hard‐anodic alumina templates. Morphological, compositional and structural characterization indicate that the composition of Co–Ni alloy segments and nanowires can be properly adjusted by varying the electrochemical deposition potential, leading to different crystalline structures (fcc or hcp) depending on the Co–Ni alloy composition. The magnetic properties of homogeneous and multisegmented Co–Ni alloy nanowire arrays, obtained from hysteresis loops and switching field distribution calculations, are correlated with their crystalline structure and effective magnetic anisotropy, to shed light on the magnetization processes that determine the magnetic behaviour of the nanowire arrays. Part (a) shows a schematic drawing of freestanding multisegmented Co 85 Ni 15 /Co 54 Ni 46 nanowires. Part (b) displays the magnetic hysteresis loops of multisegmented nanowire arrays measured along the parallel and perpendicular directions with respect to the nanowires long axis.