Title :
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
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 CoS1.035 (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; CoS1.035; CoS1.035-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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815555
