Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2413
Title: Synthesis and Properties of Cobalt Sulfide Phases: CoS2 and Co9S8
Authors: Kumar, Nitesh
Raman, Natarajan
Sundaresan, A.
Keywords: Inorganic & Nuclear Chemistry
Cobalt Sulfide
Ferromagnetism
Resistivity
Nanoparticles
Thermal Decomposition
Sensitized Solar-Cells
Counter Electrode
Solvothermal Synthesis
Magnetic-Properties
Supercapacitors
Arrays
Nanoparticles
Graphene
Issue Date: 2014
Publisher: Wiley-V C H Verlag Gmbh
Citation: Kumar, N; Raman, N; Sundaresan, A, Synthesis and Properties of Cobalt Sulfide Phases: CoS2 and Co9S8. Zeitschrift Fur Anorganische Und Allgemeine Chemie 2014, 640 (6) 1069-1074, http://dx.doi.org/10.1002/zaac.201300649
Zeitschrift Fur Anorganische Und Allgemeine Chemie
640
6
Abstract: Single phase cobalt disulfide (CoS2) nanoparticles were prepared by thermal decomposition of cobalt-thiourea complex at a low temperature (400 degrees C). CoS2 nanoparticles exhibit ferromagnetic ordering at 122 K below which the temperature dependent resistivity of cold pressed nanoparticles deviates from metallic behavior and shows a broad maximum. Just below T-C, it also exhibits a large magnetoresistance effect (6.5%). A mixture of CoS and Co9S8 phases were obtained between the temperature interval 400 degrees C < T < 1000 degrees C. At 1000 degrees C, a pure bulk Co9S8 phase was obtained. It exhibits magnetic hysteresis typical of a ferromagnet at room temperature and a peak in magnetization at low temperature with a strong relaxation indicating possible spin glass state.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2413
ISSN: 0044-2313
Appears in Collections:Research Articles (Sundaresan A.)

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