PLD fabrication of oriented nanowires in magnetic field

• Published in: Applied surface science 2019-03, Vol.471, p.368-374
• Main Authors: Nikov, Ru.G., Dikovska, A.Og, Avdeev, G.V., Amoruso, S., Ausanio, G., Nedyalkov, N.N.
• Format: Article
• Language: English
• Subjects: Iron oxide; Magnetic field; Nanowires; PLD
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2018.12.030

[Display omitted] •Iron oxide nanowires are fabricated by PLD in the presence of magnetic field.•The ambient gas and its pressure strongly influence the nanowires characteristics.•Nanowires produced in open air are aligned along the magnetic field lines.•The density of the nanowires decreases with the increase of the target-substrate distance.•The nanowires show hysteresis with values of the coercive field of ∼500 Oe at 5 K. This paper presents an experimental investigation on laser-assisted fabrication of oriented nanowires composed by magnetic nanoparticles. The nanowires were produced by implementation of pulsed laser deposition in presence of a magnetic field. The application of an external magnetic field led to the formation of nanowires with a length of several micrometers whose orientation is influenced by the direction of the magnetic field lines. The influence of the type of ambient gas and its pressure on morphology and phase composition of the deposited samples was investigated. It was found that the ambient gas has direct influence on both the degree of orientation and the phase composition of the nanowires. SEM analysis of samples deposited at different target-substrate distances showed that the density of the nanowires decreases with the increase of the distance. A preliminary result on the magnetic properties of the produced nanowires is also reported.