【摘 要】
：
We propose a method to quantitatively characterize the fine phase transition processes of Li+/Er3+∶BaTiO3(BLET)ferroelectric materials by observing fluorescence wavelength shift.A lithium and erbium co-doped barium titanate ferroelectric ceramic was fabri
【机 构】
：
School of Physics,Harbin Institute of Technology,Harbin 150001,China;Condensed Matter Science and Te
论文部分内容阅读
We propose a method to quantitatively characterize the fine phase transition processes of Li+/Er3+∶BaTiO3(BLET)ferroelectric materials by observing fluorescence wavelength shift.A lithium and erbium co-doped barium titanate ferroelectric ceramic was fabricated and the down-conversion infrared fluorescence spec-tra of the transition 4I13/2 → 4I15/2 were measured as a function of temperature.The three structural phase transition processes,namely rhombohedral-orthorhombic,orthorhombic-tetragonal,and tetragonal-cubic transformations,determined by X-ray diffraction results are accompanied by corresponding changes in the position of the fluorescence peaks,yielding an exact consistency.This contactless,non-destructive and spatially-resolved fluorescence method provides a localized quantitative analysis for the phase tran-sition processes of BLET ceramics.As this method is based on the fluorescence peak wavelength depen-dence on the crystal environment,it may potentially be used to characterize the phase transitions in other ferroelectric materials.
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