The influence of the synthesis conditions on the magnetic behaviour of the densely packed arrays of Ni nanowires in porous anodic alumina membranes

Alla Vorobjova, Daria Tishkevich*, Dmitriy Shimanovich, Tatiana Zubar, Ksenia Astapovich, Artem Kozlovskiy, Maxim Zdorovets, Aliaksandr Zhaludkevich, Dmitry Lyakhov, Dominik Michels, Denis Vinnik, Valery Fedosyuk, Alex Trukhanov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The densely packed arrays of Ni nanowires of 70 nm diameter and 6-12 μm length were obtained via electrodeposition into porous alumina membranes (PAAMs) of 55-75 μm thickness. The morphology, microstructure and magnetic properties between the room and liquid-helium temperature of Ni nanowires in PAAMs have been investigated using scanning electron microscopy, X-ray diffraction and vibrating sample magnetometry. The crystal structure of the Ni nanowires is fcc with (220) preferred orientation. The magnetic characteristics of the Ni nanowires in PAAMs were compared with the same characteristics of bulk Ni and with other researchers' data. The effect of the porous alumina membrane and the Ni nanowires synthesis conditions on the magnetic characteristics of Ni nanowire arrays has been studied. The coercivity reached more than 750 kOe and the squareness ratio up to 0.65 under the proposed optimal synthesis conditions for Ni nanowires. Magnetic parameters of the densely packed arrays of Ni nanowires allow using them in magnetic recording media, hard disk drives, storage systems and sensors. In addition, such structures are of considerable interest for basic research on nanomagnetism which is significantly different from the magnetic properties of bulk and thin films materials.

Original languageEnglish (US)
Pages (from-to)3952-3962
Number of pages11
JournalRSC ADVANCES
Volume11
Issue number7
DOIs
StatePublished - Jan 21 2021

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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