Vilma Buršíková, Pavel Dvořák, Lenka Zajíčková, Daniel Franta, Jan Janča, Jiří Buršík, Olga Bláhová, Vratislav Peřina, Petr Klapetek

Proc: Mossbauer Effect Study of Iron Thin Films on Si/SiO(x) Substrate and Iron Phases at Deposited Carbon Nanotubes

MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2010 (2010) pp.90-95

Published by AMER INST PHYSICS

A phase composition of 10 nm thick Fe film placed on the silicon substrate with 200 nm thick SiO(x) layer after annealing in vacuum and in H(2)+CH(4) was investigated using Conversion Electron Mossbauer spectroscopy (CEMS). CEMS spectra show that the original iron film was formed by Fe(3+) phase. This phase is stable after the annealing in vacuum or in H(2)+CH(4) below 500 degrees C but formation of phases with Fe(2+) and Fe(0) (gamma-Fe and alpha-Fe) was observed after annealing at 500 degrees C and higher temperatures. Formation of fayalite (Fe(2)SiO(4)) occurred during vacuum annealing at 700 degrees C. SEM and CEMS study of the sample with grown multiwalled carbon nanotubes shows that the dominating part of iron atoms is present in Fe(3)C and Fe(5)C(2) carbide phases. Besides their stoichiometric forms, the spectrum components which can be ascribed to the amorphous Fe(5-x)C(2+x) carbides, gamma-Fe, and Fe(3+) were observed.

You may also contact one of the authors: vilmab@physics.muni.cz, lenkaz@physics.muni.cz, franta@physics.muni.cz

Cited articles

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