Publications
Ferromagnetic decoration in metal-semiconductor separated and ferrocene functionalized single-walled carbon nanotubes
- Author(s)
- A. Chernov, M. Havlicek, W. Jantsch, M.H. Rümmeli, A. Bachmatiuk, K. Yanagi, H. Peterlik, H. Kataura, Franz Sauerzopf, Roland Resel, Ferenc Simon, H. Kuzmany
- Abstract
Spin resonance, magnetic measurements, and structural analysis are reported for metal-semiconductor separated SWCNTs after filling with ferrocene. Raman scattering performed after a heat treatment confirms partial transformation to double-walled CNTs but results from spin resonance (FMR), X-ray diffraction, and TEM evidence in addition the growth of ferromagnetic nanoparticles. For the metallic tubes the particles are identified as magnetite (Fe3O4) with full chemical stoichiometry. From the temperature dependence of the FMR response and from measurements of the magnetization by dc and ac SQUID the magnetite crystals are shown to undergo a Verwey transition. The transition temperature from the SQUID experiment is around 125?K as expected but considerably higher than observed from the FMR analysis. Results for semiconducting tubes are similar but magnetic particles are an order of magnitude smaller and exhibit different structures in addition to magnetite.
- Organisation(s)
- Electronic Properties of Materials, Dynamics of Condensed Systems
- External organisation(s)
- Johannes Kepler Universität Linz, Technische Universität Graz, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo Metropolitan University, Budapest University of Technology and Economics, Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Technische Universität Wien
- Journal
- Physica Status Solidi. B: Basic Research
- Volume
- 249
- Pages
- 2323-2327
- No. of pages
- 5
- ISSN
- 0370-1972
- DOI
- https://doi.org/10.1002/pssb.201200452
- Publication date
- 12-2012
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103009 Solid state physics, 103015 Condensed matter, 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/ferromagnetic-decoration-in-metalsemiconductor-separated-and-ferrocene-functionalized-singlewalled-carbon-nanotubes(03402e9c-0d67-414b-961d-40f5a8ff41b6).html