Template-assisted Co-Ni alloys and multisegmented nanowires with tuned magnetic anisotropy

Garcia J, Vega V, Iglesias L, Prida VM, Hernando B, Barriga-Castro ED, Mendoza-Resendez R, Luna C, Goerlitz D, Nielsch K (2014)

Publication Type: Journal article

Publication year: 2014

Journal

physica status solidi (a) Wiley

Book Volume: 211

Pages Range: 1041-1047

Journal Issue: 5

DOI: 10.1002/pssa.201300731

Abstract

Homogeneous Co85Ni15 and Co54Ni 46 alloys, together multisegmented Co85Ni 15/Co54Ni46 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 Co85Ni 15/Co54Ni46 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. The study of nanostructured magnetic materials synthesized through electrochemical methods by employing anodic aluminum oxide membranes as patterned templates has recently attracted a huge attention. García et al. have electroplated Co100-xNix (15 ≤ x ≤ 61) alloy nanowires of about 180 nm in diameter into the pores of hard-anodic nanoporous alumina membranes, as well as multisegmented Co54Ni 46/Co85Ni15 nanowires with an approximate length of 300 nm per segment. The magnetic properties of the nanowire arrays were studied and correlated with the microstructural features of each alloyed/multisegmented system. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Involved external institutions

Universidad de Oviedo ES Spain (ES) Universidad Autónoma de Nuevo León MX Mexico (MX) Universität Hamburg (UHH) DE Germany (DE)

How to cite

APA:

Garcia, J., Vega, V., Iglesias, L., Prida, V.M., Hernando, B., Barriga-Castro, E.D.,... Nielsch, K. (2014). Template-assisted Co-Ni alloys and multisegmented nanowires with tuned magnetic anisotropy. physica status solidi (a), 211(5), 1041-1047. https://dx.doi.org/10.1002/pssa.201300731

MLA:

Garcia, Javier, et al. "Template-assisted Co-Ni alloys and multisegmented nanowires with tuned magnetic anisotropy." physica status solidi (a) 211.5 (2014): 1041-1047.

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