title: Synthesis of crystalline beta-FeSi2 under high-temperature and high-pressure.
abstract: In this paper, we report the synthesis of crystalline beta-FeSi2 via the reaction of Si and Fe powders under high-temperature and high-pressure. X-ray diffraction and Raman scattering results confirm formation of the beta-FeSi2 phase. Scanning electron microscopy, high-resolution transmission electron microscopy, and selected-area electron diffraction patterns show that the beta-FeSi2 phase coexists with Si phase with small nanocrystal sizes. The formation of the beta-FeSi2 phase is a result of Si diffusion into Fe region. The obtained results suggest that the removal of Si phase can be reached through increasing Fe content and prolonging the duration of high-pressure thermal treatment.
authors.affiliation: National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, PR China.
authors.forename: W N
authors.initials: WN
authors.lastname: Su
authors.forename: X L
authors.initials: XL
authors.lastname: Wu
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Zhang
authors.forename: J C
authors.initials: JC
authors.lastname: Shen
authors.forename: J M
authors.initials: JM
authors.lastname: Zhu