Two‐dimensional laser‐induced fluorescence imaging of a pulsed‐laser deposition process of YBa2Cu3O7−x
Two‐dimensional laser‐induced fluorescence imaging of a pulsed‐laser deposition process of YBa2Cu3O7−x
复制标题
YBa2Cu3O7−x 脉冲激光沉积过程的二维激光诱导荧光成像
DOI：
10.1063/1.363082
复制
发表时间：
1996
影响因子：
3.2
通讯作者：
M. Maeda
中科院分区：
文献类型：
--
作者：
Y. Nakata;H. Kaibara;T. Okada;M. Maeda
在脉冲激光沉积（PLD） YBa2Cu3O7−x过程中，用二维激光诱导荧光测量了基态钡（Ba）和铜（Cu）原子以及基态氧化钇（YO）分子的二维时间分辨密度分布。在真空和1torr之间的环境氧气压力下，研究了PLD的气相。对每一种被测基态物种的特征行为都进行了观察。这是由于不同的氧化方案与周围的氧气。YO分子主要在烧蚀羽流膨胀前沿附近形成，Ba原子则在羽流前沿立即被氧化。然而，Cu原子在PLD的气相中没有发生反应。此外，在100 mTorr以上的氧气压力下，还观察到烧蚀羽流扩张前沿的边界。还讨论了发射态Ba、Cu和YO的密度分布测量。
Two‐dimensional time‐resolved density distributions of ground state barium (Ba) and copper (Cu) atoms as well as ground state yttrium oxide (YO) molecules have been measured by two‐dimensional laser‐induced fluorescence during a pulsed‐laser deposition (PLD) process of YBa2Cu3O7−x. The gas phase of PLD has been investigated at ambient oxygen gas pressures between vacuum and 1 Torr. Characteristic behaviors have been observed for each of the measured ground state species. This is due to different oxidation schemes with the ambient oxygen gas. Whereas YO molecules mainly formed near the expanding front of the ablation plume, Ba atoms immediately oxidized at the plume front. Cu atoms, however, did not react during the gas phase of PLD. In addition, a well defined boundary of the expanding front of the ablation plume has been observed at oxygen gas pressures above 100 mTorr. Measurements of density distributions of emissive Ba, Cu, and YO are also discussed.