Dresden 2006 – scientific programme

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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.100: Poster

Tuesday, March 28, 2006, 15:15–19:15, P1

Influence of the growth temperature on the morphology and the magnetic properties of vertically aligned Fe-filled MWNTs grown on silicon substrates — •Radinka Kozhuharova-Koseva, Dieter Elefant, Matthias Hofmann, Albrecht Leonhardt, Ingolf Mönch, Manfred Ritschel, Thomas Mühl, and Bernd Büchner — Leibniz-Institute of Solid State and Material Research Dresden, P.O. Box 270016, D-01171 Dresden, Germany

Arrays of vertically aligned Fe-filled multi-walled carbon nanotubes on oxidized silicon substrates were prepared by pyrolysis of ferrocene in a dual furnace system and characterized by electron microscopy and magnetization measurements. The effect of the growth temperature on the filled nanotube morphology and magnetic properties was studied. Increasing the growth temperature in the range of 845-1035 Centigrade the nanotube diameter increases from 20 to 110 nm and the diameter of the encapsulated Fe nanowires becomes larger (from 8 to 40 nm), respectively. Moreover, at higher growth temperature, lower coercivities and remanence ratios of the studied samples were obtained. Factors causing the observed magnetic behavior will be discussed.