4.7 Article

Synthesis and magnetic properties of size-controlled CoNi alloy nanoparticles

Journal

JOURNAL OF ALLOYS AND COMPOUNDS
Volume 546, Issue -, Pages 229-233

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.08.063

Keywords

CoNi alloy nanoparticles; Size control; Magnetic properties

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CoNi alloy nanoparticles were obtained using liquid phase reduction method. The size of particles was selected as the research index, and the impacts of experimental conditions on the particle size were investigated. These experimental conditions included reaction temperature, solvent, initial concentration, and the amount of reducing agent and surface active agent. Through the orthogonal test, the optimized process parameters of preparing CoNi alloy nanoparticles by liquid-phase reduction were determined. The size of the particles prepared on the basis of the optimum technology was 60 nm. The particle size would impact the magnetic properties of CoNi nanoparticles measured by the test of hysteresis loops. The test result showed that the Hc of the CoNi alloy nanoparticles decreased and the Ms increased, with the increase of the particle size. (c) 2012 Elsevier B.V. All rights reserved.

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