Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Micro- and Nanostructured Magnetic Materials IV
MA 43.7: Vortrag
Mittwoch, 16. März 2011, 18:30–18:45, HSZ 103
Quantum oscillations and ferromagnetic hysteresis observed in iron filled multiwall carbon nanotubes — •Jose Barzola-Quiquia1, Niko Klingner1, Axel Molle1, and Albrecht Leonhardt2 — 1Division of Superconductivity and Magnetism, University of Leipzig, D-04103 Leipzig, Germany — 2Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany
Carbon-based materials as multiwall carbon nanotubes (MWCNT) are attractive for spintronics because spin is only weakly coupled to the lattice, leading to large spin-flip scattering length and long spin relaxation times. In this contribution we have investigated the electrical transport properties of iron filled MWCNT (outer diameter 150 nm, inner diameter 25 nm and length 2000 nm) as a function of temperature and magnetic field. We observed quantum interference effects, i.e. universal conductance fluctuations, and weak localization effects. The in-plane magnetoresistance shows typical butterfly structure revealing the ferromagnetic properties of the Fe-filled MWCNT. The ferromagnetic hysteresis was observed up to 40K.