Cylindroid rigid-wall simulation of the influence of gas pressure in pulsed laser deposition of LiNbO3 films
Cylindroid rigid-wall simulation of the influence of gas pressure in pulsed laser deposition of LiNbO3 films
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圆柱刚性壁模拟脉冲激光沉积 LiNbO3 薄膜中气压的影响
DOI:
10.1063/1.1540217
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发表时间:
2003-01
期刊:
影响因子:
--
通讯作者:
M. R. Shen
中科院分区:
文献类型:
--
作者:
X. Yang;X. L. Wu*;Z. Y Zhang;G. G. Siu;Z. G. Dong;L. Fang;M. R. Shen
We have demonstrated that gas pressure (pG) is a key parameter for fabricating stoichiometric LiNbO3 thin films during laser ablation. To theoretically describe the influence of pG, a cylindroid rigid-wall model was presented. It was shown that there exist two critical pressures related to Li and Nb: pLi and pNb(pLi<pNb). They separate pG into three intervals. When pG<pLi, pG has little influence on film stoichiometry and the obtained films contain fixed Li deficiency. When pLi⩽pG⩽pNb, pG plays an important role in forming stoichiometric films. When pG⩾pNb, the change of pG does not affect film stoichiometry, but the film growth because of greatly reduced energies of the species that reach the substrate. The presented theory was in good agreement with experiments. This model provides a useful way for growing multicomponent films by pulsed laser deposition.
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DOI:
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