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Structure, intrinsic properties and vibrational spectra of Pr(MgSn)O Ceramic Crystal

Scientific Reports, ISSN: 2045-2322, Vol: 7, Issue: 1, Page: 13336
2017
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Article Description

Pr(MgSn)O (PMS) ceramic was prepared through a conventional solid-state reaction method. Crystal structure was investigated through X-ray diffraction (XRD), which certificates that the main phase is PMS with monoclinic P2 /n1 symmetry. Lattice vibrational modes were obtained through Raman scattering spectroscopy and Fourier transform far-infrared reflection spectroscopy. The Raman spectrum active modes were assigned and illustrated, respectively, and then fitted with Lorentzian function. The four modes within the range of 110-200 cm are derived from the F vibrations (A-site cations), and the other three modes (300-430 cm) are derived from the F vibrations (B-site cations).The mode with highest frequency above 650 cm is attributed to A -like mode that corresponds to the symmetric breathing of oxygen octahedral. The far-infrared spectrum with seven infrared active modes was fitted using four-parameter semi-quantum models to calculate intrinsic properties (permittivity and loss). F yielded the greatest contribution to dielectric constant and loss, which is mainly performed as the inverted translational vibration of Pr-MgO octahedron.

Bibliographic Details

Qiao, Hengyang; Sun, Haiqing; Li, Jianzhu; Chen, Huiling; Xing, Chao; Yang, Jun; Dong, Helei; Wang, Jing; Yin, Xunqian; Qi, Ze-Ming; Shi, Feng

Springer Science and Business Media LLC

Multidisciplinary

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