Volume 117, Number 2, January 2017
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||13 March 2017|
Impact of CNT medium on the interaction between ferromagnetic nanoparticles
1 Belarusian State University of Informatics and Radioelectronics - P. Browka 6, Minsk 220013, Belarus
2 National Research Nuclear University “MEPHI” - Kashirskoe Highway 31, Moscow 115409, Russia
3 Laboratory of Engineering, Informatics and Imagery (ICube) - Départment Electronique des Solides, des Systèmes et de Photonique (DESSP), Université de Strasbourg and CNRS - Bat. 28, 23 Rue du Loess, BP 20 CR, 67037, Strasbourg Cedex 2, France
4 Departament de Física de la Materia Condensata, Universitat de Barcelona - C. de Martí i Franquès 1, 08028 Barcelona, Spain
Received: 20 December 2016
Accepted: 27 February 2017
We present results on low-temperature magnetization approaching the saturation law in aligned bundles of CNTs with ferromagnetic nanoparticles embedded inside inner channels of nanotubes for two directions of the magnetic field, parallel and perpendicular to the CNT axes. Elaborating experimental data, we were able to extract the explicit form of the correlation functions describing the orientation of the magnetic anisotropy axes in real space. In the parallel field the long-range coherence in the magnetic anisotropy axes is the characteristic feature. In the perpendicular direction the peculiar feature is the 2D exchange coupling. The nature of the exchange interaction and the role of the CNT medium in it is also discussed.
PACS: 75.75.-c – Magnetic properties of nanostructures / 75.50.Tt – Fine-particle systems; nanocrystalline materials / 75.30.Gw – Magnetic anisotropy
© EPLA, 2017
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