Optical Properties of NaSUB1/2/SUBBiSUB1/2/SUBTiOSUB3/SUB-BaTiOSUB3/SUB Thin Films Obtained by Pulsed Laser Deposition

V. Ion; A. Andrei; L.N. Dumitrescu; M. Dinescu

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Optical Properties of NaSUB1/2/SUBBiSUB1/2/SUBTiOSUB3/SUB-BaTiOSUB3/SUB Thin Films Obtained by Pulsed Laser Deposition

机译：脉冲激光制备的Na _{1/2 Bi _{1/2 TiO _{3 -BaTiO _{3 薄膜的光学性质沉积}}}}

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In this paper we report on the optical properties of (Na0.5Bi0.5TiO3)1-x –(BaTiO3)x (NBT-BT) thin films with different compositions, outside and inside around the morphotropic phase boundary (MPB), deposited by Pulsed Laser Deposition. The coexistence of rhombohedral and tetragonal phases in polycrystalline films was evidenced for compositions within the MPB. Optical properties have been discussed also for layers with composition outside the MPB. From the ellipsometric spectra, the refractive index and extinction coefficients were determined using a sum of Gauss and Cody-Lorentz oscillators. The band gap values for different concentrations of BaTiO3 were extracted from the Tauc plots.

机译：在本文中，我们报道了由变质相边界（MPB）周围和内部沉积的，具有不同成分的（Na0.5Bi0.5TiO3）1-x –（BaTiO3）x（NBT-BT）薄膜的光学性质脉冲激光沉积。多晶薄膜中菱形和四方相的共存被证明是MPB中的成分。对于具有MPB外部成分的层，还讨论了光学性能。根据椭圆偏振光谱，使用高斯和科迪-洛伦兹振荡器之和确定折射率和消光系数。从Tauc图中提取了不同浓度的BaTiO3的带隙值。

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《Romanian journal of physics》 |2018年第8期|共页
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V. Ion; A. Andrei; L.N. Dumitrescu; M. Dinescu;
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Optical Properties of NaSUB1/2/SUBBiSUB1/2/SUBTiOSUB3/SUB-BaTiOSUB3/SUB Thin Films Obtained by Pulsed Laser Deposition

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