FMR study of carbon nanotubes filled with Fe3O4 nanoparticles


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.



subject category

Materials Science; Physics


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

our authors


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

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".