...
首页> 外文期刊>Coatings >Phase Transformation and Superstructure Formation in (Ti0.5, Mg0.5)N Thin Films through High-Temperature Annealing
【24h】

Phase Transformation and Superstructure Formation in (Ti0.5, Mg0.5)N Thin Films through High-Temperature Annealing

机译:通过高温退火(Ti0.5,Mg0.5)N薄膜的相变和超结构形成

获取原文
   

获取外文期刊封面封底 >>

       

摘要

(Ti0.5, Mg0.5)N thin films were synthesized by reactive dc magnetron sputtering from elemental targets onto c-cut sapphire substrates. Characterization by θ–2θ X-ray diffraction and pole figure measurements shows a rock-salt cubic structure with (111)-oriented growth and a twin-domain structure. The films exhibit an electrical resistivity of 150 mΩ·cm, as measured by four-point-probe, and a Seebeck coefficient of ?25 μV/K. It is shown that high temperature (~800 °C) annealing in a nitrogen atmosphere leads to the formation of a cubic LiTiO2-type superstructure as seen by high-resolution scanning transmission electron microscopy. The corresponding phase formation is possibly influenced by oxygen contamination present in the as-deposited films resulting in a cubic superstructure. Density functional theory calculations utilizing the generalized gradient approximation (GGA) functionals show that the LiTiO2-type TiMgN2 structure has a 0.07 eV direct bandgap.
机译:(Ti0.5,Mg0.5)N薄膜通过从元素靶标在C切割的蓝宝石基材上的反应性DC磁控溅射而合成。 θ-2θX射线衍射和极图测量的表征显示岩盐立方结构,具有(111)的生长和双结构域结构。 通过四点探针测量,薄膜的电阻率为150mΩ·cm,以及Δ25μV/ k的塞贝克系数。 结果表明,在氮气氛中的高温(〜800℃)导致由高分辨率扫描透射电子显微镜观察的立方LitiO2型超山结构的形成。 相应的相形成可能受到存在于沉积薄膜中存在的氧污染的影响,导致立方体上层建筑。 利用广义梯度近似(GGA)功能的密度函数理论计算表明,Litio2型TIMGN2结构具有0.07eV直接带隙。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号