Growth and Characterization of Er3+-doped Relaxor-based Ferroelectric Crystal PMNT

doi:10.15541/jim20140278

Abstract

Abstract:

According to the molar ratio of 0.71Pb(Mg_1/3Nb_2/3)O₃-0.26PbTiO₃-0.03Pb(Er_1/2Nb_1/2)O₃, Er³⁺-doped PMNT polycrystalline material was prepared by two-step solid-state synthesis at elevated temperature. Er³⁺-doped PMNT relaxor-based ferroelectric crystal with size of φ25 mm × 100 mm was grown from the stoichiometric melts by vertical Bridgman method. In the ferroelectric crystal with perovskite structure, Er³⁺ ions were doped into the crystal lattice via one composition of the ternary solid solution compound. The dielectric, piezoelectric and ferroelectric properties and up-conversion emission performance of Er³⁺-doped PMNT crystal wafers were investigated systematically. It is verified that Er³⁺-doped PMNT crystal presents the similar electrical properties to those of undoped PMNT crystal. Under the excitation of 980 nm, the crystal also exhibits a strong up-conversion fluorescence emission characteristic to Er³⁺ ions doped in the medium, and the emission intensity will be enhanced after being poled.

Key words: Er3+-doped PMNT crystal, crystal growth, vertical Bridgman method, electrical properties, up-conversion emission

CLC Number:

XIANG Jun-Tao, DU Peng, LUO Lai-Hui, FANG Yi-Quan, ZHAO Xue-Yang, HU Xu-Bo, CHEN Hong-Bing. Growth and Characterization of Er³⁺-doped Relaxor-based Ferroelectric Crystal PMNT[J]. Journal of Inorganic Materials, 2015, 30(2): 135-140.

Figures/Tables 9

Fig. 1 XRD patterns of the precursors MgNb2O6 (a) and ErNbO4 (b)

Fig. 2 XRD pattern of Er3+-doped PMNT poly-crystalline material

Fig. 3 Single crystal boule (a) and wafers (b) of Er3+-doped PMNT

Fig. 4 Temperature dependance of dielectric permittivity and dielectric loss of Er3+-doped PMNT crystal wafer

Fig. 5 Polarization hysteresis loops of Er3+-doped crystal wafer

Fig. 6 Room temperature absorption spectrum of Er3+-doped crystal wafer

Fig. 7 Optical transmission spectra of poled and unpoled Er3+-doped PMNT crystal wafer

Fig. 8 Upconversion emission spectra of unpoled and poled Er3+-doped crystal wafer

Fig. 9 Energy diagrams for up-conversion emission in Er3+ ions doped medium

References 14

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Growth and Characterization of Er³⁺-doped Relaxor-based Ferroelectric Crystal PMNT

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