title: Infrared study of Er(3+)/Yb(3+) Co-Doped GeO(2)-PbO-Bi(2)O(3) glass.
abstract: Heavy metal oxide glasses, containing bismuth and/or lead in their glass structure are new alternatives for rare eart (RE) doped hosts. Hence, the study of the structure of these vitreous systems is of great interest for science and technology. In this research work, GeO(2)-PbO-Bi(2)O(3) glass host doped with Er(3+)/Yb(3+) ions was synthesized by a conventional melt quenching method. The Fourier transform infrared (FTIR) results showed that PbO and Bi(2)O(3) participate with PbO(4) tetragonal pyramids and strongly distort BiO(6) octahedral units in the glass network, which subsequently act as modifiers in glass structure. These results also confirmed the existence of both four and six coordination of germanium oxide in glass matrix.
authors.affiliation: Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, UPM 43400, Malaysia.
authors.forename: Hamid-Reza
authors.initials: HR
authors.lastname: Bahari
authors.affiliation: Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, UPM 43400, Malaysia.
authors.forename: Hj A A
authors.initials: HAA
authors.lastname: Sidek
authors.affiliation: Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia.
authors.forename: Faisal Rafiq M
authors.initials: FRM
authors.lastname: Adikan
authors.affiliation: Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, UPM 43400, Malaysia.
authors.forename: Wan M M
authors.initials: WMM
authors.lastname: Yunus
authors.affiliation: Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, UPM 43400, Malaysia.
authors.forename: Mohamed K
authors.initials: MK
authors.lastname: Halimah
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D010087:Oxides; D005857:Germanium; D007854:Lead; C047365:lead oxide; C040516:germanium oxide; D004871:Erbium; C033301:bismuth oxide; D015018:Ytterbium; D001729:Bismuth