한국분말재료학회지 (Journal of Powder Materials)

  • 제14권5호
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  • Pages.281-286
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  • 2007
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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화학기상응축(Chemical Vapor Condensation)공정으로 제조한 L10규칙상 Fe50Pt50 나노분말의 특성

Characteristics of L10 Ordered Fe50Pt50 Nanoparticles Synthesized by Chemical Vapor Condensation Process

  • 이경모 (한국기계연구원 부설 재료연구소) ;
  • 유지훈 (한국기계연구원 부설 재료연구소) ;
  • 이동원 (한국기계연구원 부설 재료연구소) ;
  • 김병기 (한국기계연구원 부설 재료연구소) ;
  • 김혁돈 (선문대학교 전자재료공학과) ;
  • 장태석 (선문대학교 전자재료공학과)
  • 발행 : 2007.10.28
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초록

Ordered $L1_0$ to FePt nanoparticles are strong candidates for high density magnetic data storage media because the $L1_0$ phase FePt has a very high magnetocrystalline anisotropy $(K_u{\sim}6.6-10{\times}10^7erg/cm^3)$, high coercivity and chemical stability. In this study, the ordered $L1_0$ FePt nanoparticles were successfully fabricated by chemical vapor condensation process without a post-annealing process which causes severe particle growth and agglomeration. The $Fe_{50}Pt_{50}$ nanopowder was obtained when the mixing ratio of Fe(acac) and Pt(arac) was 2.5 : 1. And the synthesized FePt nanoparticles were very fine and spherical shape with a narrow size distribution. The average particle size of the powder tended to increase from 5 nm to 10 nm with increasing reaction temperature from $800^{\circ}C$ to $1000^{\circ}C$. Characterisitcs of FePt nanopowder were investigated in terms of process parameters and microstructures.

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