Growth of Ru-doped β-FeSi2 polycrystalline thin films by RF magnetron sputtering. (1st May 2023)

• Record Type: Journal Article
• Authors: Terai, Yoshikazu; Yoshihara, Ren; Oishi, Yuya
• Is Part Of: Japanese journal of applied physics. Volume 62:Number SD(2023)
• Publication Date: 2023-05-01
• Subjects: ternary silicide -- iron silicide -- photoluminescence; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/aca59b
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Ternary silicide β -(Fe1− x Ru x )Si2 polycrystalline thin films were fabricated by RF magnetron sputtering. The crystal structure of β -(Fe1− x Ru x )Si2 was the same orthorhombic (space group: Cmca ) as β -FeSi2 in the Ru composition of 0 ≤ x ≤ 0.63. The lattice constants increased with increasing Ru composition, and Vegard's law was obtained. The wavenumber of the Raman line of Fe−Fe and Fe−Si vibrations shifted to a lower wavenumber with increasing Ru composition. The 1.5 μ m photoluminescence (PL) was observed in Si/ β -(Fe1− x Ru x )Si2 /Si double heterostructure (DH) with x = 0.57. The PL lifetime of the Ru-doped DH sample was shorter than that of the β -FeSi2 ( x = 0) DH sample.