Preparation and characterization of Co–BaTiO₃ nano-composite films by the pulsed laser deposition

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• 作者：Wu Weidong ; He Yingjie ; Wang Feng ; Chen Zhenghao ; Tang Yongjian and Sun Weiguo
• 关键词：A3. Pulsed laser deposition ; B1. BaTiO₃ ; B1. Nanocomposite films
• 刊名：Journal of Crystal Growth
• 出版年：2006
• 期刊代码：49_00220248
• 类别：ch
• 出版时间：15 March 2006
• 卷：289
• 期：1
• 页码：408-413
• 文件大小：676 K

摘要

The Co–BaTiO₃ nanocomposite films on the MgO (1 0 0) surface were grown with a thickness of about 30–100 nm by using the pulsed laser deposition (PLD) method. Co nanoparticles with the diameter of 5–18 nm were embedded uniformly in the BaTiO₃ matrix. The measurements with the X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) indicate that the BaTiO₃ matrix is grown in the (0 0 1) direction with respect to the MgO(1 0 0) surface. The AFM images show that the root of mean squared (RMS) roughness of Co–BaTiO₃ ranges from 0.11 to 0.9 nm. The Raman scattering on the Co–BaTiO₃ nano-composite films shows an enhanced intensity and a shifted wavenumber compared to the pure BaTiO₃ crystal.