Magnetic properties of a mixture of two nanosized Co-S powders produced by hydrothermal reduction

Author

Sun, X.C. ; Parvin, K. ; Ly, J. ; Nikles, D.E.

Author_Institution

Center for Mater. for Inf. Technol., Univ. of Alabama, Tuscaloosa, AL, USA

Volume

39

Issue

5

fYear

2003

Firstpage

2678

Lastpage

2680

Abstract

Hydrothermal reduction synthesis of transition-metal sulfide nanophase is the treatment of aqueous solutions of precursors such as cobalt acetate and thiourea at elevated temperatures in pressurized vessels. In this technique, particle size, morphology, and phase homogeneity can be controlled rendering materials with a wide range of magnetic properties. We report the synthesis and structural characterization of a mixture of CoS_1.035 (30%) and Co₉S₈ (70%) nanoparticles that were prepared by this method and discuss their magnetic properties over the temperature range 2.0-300 K.

Keywords

X-ray diffraction; cobalt compounds; ferromagnetic materials; magnetic particles; nanoparticles; particle size; reduction (chemical); Co₉S₈; CoS_1.035; CoS_1.035-Co₉S₈; cobalt acetate; hydrothermal reduction; magnetic properties; morphology; nanosized Co-S powders; particle size; phase homogeneity; thiourea; Cobalt; Magnetic properties; Morphology; Nanoparticles; Powders; Scanning electron microscopy; Sun; Temperature distribution; Transmission electron microscopy; X-ray scattering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.815555

Filename

1233182