화학기상응축(Chemical Vapor Condensation)공정으로 제조한 L10 규칙상 Fe50Pt50 나노분말의 특성

Abstract

Ordered L10 FePt nanoparticles are strong candidates for high density magnetic data storage media because the L10 phase FePt has a very high magnetocrystalline anisotropy (Ku~6.6-10 107 erg/cm3), high coercivity and chemical stability. In this study, the ordered L10 FePt nanoparticles were successfully fabricated by chemical vapor condensation process without a post-annealing process which causes severe particle growth and agglomeration. The Fe50Pt50 nanopowder was obtained when the mixing ratio of Fe(acac) and Pt(acac) 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℃ to 1000℃. Characterisitcs of FePt nanopowder were investigated in terms of process parameters and microstructures.