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10. Shape-controlled synthesis of FeNi3 nanoparticles by ambient chemical reduction and their magnetic properties

Author

Nie Zuo-ren, Cheng Hua, Li Fan, Guo Hongxia, Cui Suping, and Qin Zhenping

Subjects
Materials science, Mechanical Engineering, Alloy, Analytical chemistry, Nanoparticle, Coercivity, engineering.material, Condensed Matter Physics, Redox, Nuclear magnetic resonance, Mechanics of Materials, Permeability (electromagnetism), Chemical reduction, engineering, General Materials Science, Ultrasound irradiation
Abstract

A facile method to control the morphology of FeNi3 nanoparticles by solution reduction reaction is presented. The spherical to platelet FeNi3 particles were obtained by changing pH from 11.5 to12.5 with 0.16 mol/L of hydrazine under ultrasound irradiation, with the ratio of Fe2+ to Ni2+ as 1:3. The amount of hydrazine had little influence on the morphology of the particles. The saturation magnetization (Ms) and coercive force (Hc) of the platelet particles were 59 emu/g and 120 Oe, respectively. The real part μ’ of the permeability of the platelet particles was about 2.43–2.71 and was frequency-independent in the range of 0.1–1.0 GHz. The imaginary part (μ”) of the particles showed increase from 0.04 to 2.14 within the same frequency range.

Published
2012

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