剂诱导的局部振动模式对Mn和Co-doped ZnO中压力驱动的结构相变的影响
Chih-Ming Lin1, Yi-Jia Tsai1, Yi-Sheng Huang1
1Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan.
和的剂改变了氧化 (ZnO) 的高压相变. 拉曼光谱学揭示了化 ZnO 中独特的格子动态和结构演变,影响了其材料特性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 频谱学是一种光谱学.
背景情况:
- 氧化 (ZnO) 的晶体结构在环境条件下稳定.
- 高压可以诱导ZnO的相变,改变其结构和电子性质.
- 与 (Mn) 和 (Co) 等过渡金属合 ZnO,可以在压力下改变其行为.
研究的目的:
- 为了研究和Co doping对ZnO.高压相变的作用.
- 探索兴奋剂如何影响压缩下ZnO的晶格动态和结构演变.
- 为了证明in-situ激光拉曼光谱在检测兴奋剂诱导的变化中的实用性.
主要方法:
- 在现场使用激光拉曼光谱法.
- 对原始的ZnO,Zn0.98Mn0.02O和Zn0.98Co0.02O进行了测量.
- 样品受到高压,高达18.6GPa的压力.
主要成果:
- 纯净的ZnO显示出具有特征的乌尔茨酸声模式.
- 和Co-doping引入了不同的局部振动模式,具有独特的压力依赖转移.
- 与原始和Co-doped ZnO 相比,Zn0.98Mn0.02O 呈现出不同的相位过渡路径.
- 拉曼光谱成功地检测出了兴奋剂诱导的晶格动态的改变.
结论:
- 用Mn和Co进行兴奋剂显著影响ZnO的高压相变.
- 通过拉曼光谱检测到的局部格子效应在调节相位过渡方面发挥着至关重要的作用.
- 这些发现为设计基于ZnO的材料提供了洞察力,这些材料具有针对光电子和高压应用的定制性质.
更多相关视频
06:49Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
Published on: April 12, 2019
12:18Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys
Published on: June 27, 2022
相关概念视频
Phase Transitions
Atomic Nuclei: Nuclear Relaxation Processes
Phase Transitions: Sublimation and Deposition
Phase Transitions: Vaporization and Condensation
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Magnetic Damping
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
