FMR study of carbon nanotubes filled with Fe3O4 nanoparticles

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abstract

Ordered arrays of carbon nanotubes were produced using a non catalytic chemical vapour deposition. The multiwall nanotubes with an inner diameter of 120 nm were grown inside porous alumina templates and then filled with a magnetic colloid of 7.5 nm Fe3O4 particles. X-ray diffraction, electron microscopy and ferromagnetic resonance (FMR) were used to characterize structural and magnetic properties of the grown samples. To estimate the filling factor from the angular dependence of the FMR resonance field, we have derived an effective demagnetization factor for our system using the formalism proposed by Skomsky and Dubowik. Angular dependence of the FMR line width allows one to conclude about the non uniform filling, while temperature dependent measurements reflect typical features of a super paramagnetic resonance. (C) 2014 Elsevier B.V. All rights reserved.

keywords

MAGNETIC NANOPARTICLES; PARTICLES; RESONANCE; SPECTRA

subject category

Materials Science; Physics

authors

Kopyl, S; Timopheev, AA; Bystrov, VS; Bdikin, I; Teixeira, BMS; Maevskij, E; Sobolev, NA; Sousa, ACM

our authors

foto Svitlana Kopyl

Svitlana Kopyl

Researcher
foto Vladimir Bystrov

Vladimir Bystrov

Post-doc Fellowship

Groups

G2 - Photonic, Electronic and Magnetic Materials

Projects

RMNE-UA-National Network of Electron Microscopy (REDE/1509/RME/2005 )

acknowledgements

This work has been supported the FCT of Portugal through projects and grants PTDC/EME-MFE/105031/2008, PEst-C/CTM /LA0025/2011, RECI/FIS-NAN/0183/2012, SFRH/BPD/22230/2005, SFRH /BPD /74086/2010, REDE/1509/RME/2005, and European project

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Publication Details

type
Journal Article
year
2014
journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
volume
358
publisher
ELSEVIER SCIENCE BV
issn
0304-8853
digital object identifier
10.1016/j.jmmm.2014.01.029
web of science article identifier
WOS:000332393500009

Journal Metrics (JCR 2019)

Journal Impact Factor
2.717
Journal Impact Factor (5 yrs)
2.723
category normalized journal percentile
54.977

Citations

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