کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1666837 | 1518075 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Substrate-dependant chemical stability and conductivity of LaNiO3 − x thin films Substrate-dependant chemical stability and conductivity of LaNiO3 − x thin films](/preview/png/1666837.png)
This work studies the chemical stability and the changes of structure and electrical conductivity of LaNiO3 − x films under the low oxygen partial pressure (pO2) atmosphere. Polycrystalline and epitaxial LaNiO3 − x films were grown on a number of substrates including Si, LaAlO3 and SrTiO3 by sol–gel method. A range of structural and electrical characterizations were carried out for the grown films. The results showed that the chemical stability and oxygen stoichiometry of the LaNiO3 − x films were substrate-dependent, as well as influenced by the preparation process. The compressive strain introduced by the heteroepitaxial growth helped the films to keep a higher oxygen stoichiometry and therefore showed a higher conductivity than the polycrystalline and stretched epitaxial films. The epitaxial films, in particular under the tensile strain, showed a higher stability with a slower oxygen loss rate in vacuum at high temperature.
► Polycrystalline and epitaxial LaNiO3 − x films were grown on various substrates.
► Chemical stability and oxygen stoichiometry of the films were substrate-dependent.
► Compressively strained films intended to keep a higher oxygen stoichiometry.
► Epitaxial films showed a higher stability with a slower oxygen loss rate.
Journal: Thin Solid Films - Volume 529, 1 February 2013, Pages 356–359