Journal of Magnetics

  • 제16권3호
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  • Pages.308-311
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  • 2011
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  • 1226-1750(pISSN)
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  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
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Effect of Nucleation and Growth Dynamics on Saturation Magnetization of Chemically Synthesized Fe Nanoparticles

  • Ogawa, T. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University) ;
  • Seto, K. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University) ;
  • Hasegawa, D. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University) ;
  • Yang, H.T. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University) ;
  • Kura, H. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University) ;
  • Doi, M. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University) ;
  • Takahashi, M. (Department of Electronic Engineering, Graduate School of Engineering, Tohoku University)
  • 투고 : 2011.07.19
  • 심사 : 2011.08.25
  • 발행 : 2011.09.30
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초록

In order to obtain mono-dispersed Fe NPs with high saturation magnetization, quantitative analysis method to investigate the growth dynamics of the Fe NPs synthesized by a conventional thermal decomposition method has been developed. As a result, fast nucleation process promotes formation of ~4 nm of initial nucleus with a non-equilibrium phase, resulting in low saturation magnetization. And slow particle growth with atomic-scaled surface precipitation mode (< 100 atoms/($min{\cdot}nm^2$)) can form the growth layer on the surface of initial nucleus with high saturation magnetization (~190 emu/$g_{Fe}$) as an equilibrium a phase of Fe. Therefore, higher stabilization of small initial nucleus generated just after the injection of $Fe(CO)_5$ should be one of the key issues to achieve much higher $M_s$ of Fe NPs.

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참고문헌

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피인용 문헌

  1. Direct Synthesis of Single Crystalline $\alpha$-Fe Nanoparticles With High Saturation Magnetization by Mixed Surfactant vol.48, pp.11, 2012, https://doi.org/10.1109/TMAG.2012.2197737
  2. Core loss and magnetic susceptibility of superparamagnetic Fe nanoparticle assembly vol.6, pp.12, 2016, https://doi.org/10.1063/1.4972059