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Chi tiết
Tên Structural, optical and magnetic properties of polycrystalline BaTi1-xFexO3 ceramics (SCI)
Lĩnh vực Vật Lý
Tác giả N. V. Dang, T. D. Thanh, L. V. Hong, V. D. Lam, and The-Long Phan
Nhà xuất bản / Tạp chí Journal of Applied Physics 110, 043914-7 Năm 2011
Số hiệu ISSN/ISBN 0021-8979
Tóm tắt nội dung

Polycrystalline BaTi1-xFexO3 ceramics have been prepared by conventional solid-state reaction. Their structural, optical and magnetic properties are then studied by means of x-ray diffraction (XRD), Raman scattering (RS) and absorption spectrometers, and a physical properties measurement system. Detailed analyses of XRD patterns and RS spectra reveal the phase separation of the tetragonal-hexagonal structure at a threshold concentration of x=0.005. The increase in the Fe-doping content (x) leads to development of the hexagonal phase. Magnetic measurements prove that many BaTi1-xFexO3 samples exhibit the room-temperature ferromagnetic order, excepting the samples with x=0.02–0.06. The ferromagnetism depends strongly on concentration of Fe impurities. The nature of this ferromagnetism is discussed by means of the results of structural analyses and optical absorption spectra

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