Systematic tuning of segmented magnetic nanowires into three-dimensional arrays of ‘bits’

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Bochmann S, Fernández-Pacheco A, Mackovic M, Neff A, Siefermann KR, Spiecker E, Cowburn RP, Bachmann J
Zeitschrift: RSC Advances
Jahr der Veröffentlichung: 2017
Band: 7
Seitenbereich: 37627-37635
ISSN: 2046-2069
Sprache: Englisch


Abstract


A method is presented for the preparation of a three-dimensional magnetic data storage material system. The major ingredients are an inert nanoporous matrix prepared by anodization and galvanic plating of magnetic and non-magnetic metals in wire shape inside the cylindrical pores. The individual nanomagnets consist of a nickel–cobalt alloy, the composition of which is tuned systematically by adjusting the electrolytic bath composition at one optimal applied potential. The lowest magnetocrystalline anisotropy is obtained at the composition Ni60Co40, as quantified by superconducting quantum interference device magnetometry. Wires of this composition experience a pinning-free propagation of magnetic domain walls, as determined by single-wire magneto-optical Kerr effect magnetometry. Adding copper into the electrolyte allows one to generate segments of Ni60Co40 separated by non-magnetic copper. The segment structure is apparent in individual nanowires imaged by scanning electron microscopy, UV-photoelectron emission microscopy, and transmission electron microscopy. The single-domain structure of the wire segments is evidenced by magnetic force microscopy.



FAU-Autoren / FAU-Herausgeber

Bachmann, Julien Prof.
Lehrstuhl für Chemistry of thin film materials
Bochmann, Sebastian
Lehrstuhl für Anorganische und Allgemeine Chemie
Mackovic, Mirza Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Zusätzliche Organisationseinheit(en)
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Bochmann, S., Fernández-Pacheco, A., Mackovic, M., Neff, A., Siefermann, K.R., Spiecker, E.,... Bachmann, J. (2017). Systematic tuning of segmented magnetic nanowires into three-dimensional arrays of ‘bits’. RSC Advances, 7, 37627-37635. https://dx.doi.org/10.1039/c7ra06734h

MLA:
Bochmann, Sebastian, et al. "Systematic tuning of segmented magnetic nanowires into three-dimensional arrays of ‘bits’." RSC Advances 7 (2017): 37627-37635.

BibTeX: 

Zuletzt aktualisiert 2018-06-07 um 22:10