Structural, magnetic, and Mossbauer characterization of size-controlled iron-iron oxide nanoparticles obtained by chemical methods

Author

Vargas, José M. ; Socolovsky, Leandro M. ; Goya, Gerardo F. ; Knobel, Marcelo ; Zanchet, Daniela

Author_Institution

Laboratorio Nacional de Luz Sincrotron & Univ. Estadual de Campinas, Brazil

Volume

39

Issue

5

fYear

2003

Firstpage

2681

Lastpage

2683

Abstract

Size-controlled Fe nanoparticles have been obtained by thermal decomposition of Fe(CO)₅ in organic solution, in the presence of ligand molecules. Samples with different sizes, in the 6-12 nm range have been characterized by high-resolution transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and magnetization measurements. All samples present narrow size distributions and superparamagnetic behavior. The exposition to air leads to the formation of a polycrystalline phase, mainly Fe₃O₄.

Keywords

Mossbauer effect; iron; iron compounds; magnetisation; nanoparticles; particle size; superparamagnetism; transmission electron microscopy; 6 to 12 nm; Fe(CO)₅; Fe-Fe₂O₃; Fe-Fe₂O₃ nanoparticles; Fe-Fe₃O₄; Fe-Fe₃O₄ nanoparticles; Mossbauer characterization; X-ray diffraction; magnetic characterization; magnetization measurements; narrow size distributions; structural characterization; superparamagnetic behavior; thermal decomposition; transmission electron microscopy; Chemicals; Iron; Magnetic force microscopy; Magnetization; Nanoparticles; Size measurement; Spectroscopy; Thermal decomposition; Transmission electron microscopy; X-ray diffraction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.815556

Filename

1233183