Combinatorial High-Vacuum Chemical Vapor Deposition of Textured Hafnium-Doped Lithium Niobate Thin Films on Sapphire
| Autor: | E. Wagner, Yury Kuzminykh, Paul Muralt, Pierre Brodard, Silviu Cosmin Sandu, Patrik Hoffmann, S.A. Rushworth, Ali Dabirian, Scott Harada, Giacomo Benvenuti |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Lithium niobate Analytical chemistry Niobium chemistry.chemical_element General Chemistry Chemical vapor deposition Condensed Matter Physics Hafnium symbols.namesake chemistry.chemical_compound chemistry Vacuum deposition X-ray photoelectron spectroscopy symbols General Materials Science Thin film Raman spectroscopy |
| Zdroj: | Crystal Growth & Design. 11:203-209 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg1011583 |
| Popis: | Combinatorial high-vacuum chemical vapor deposition (HV-CVD) was used to identify the conditions required to obtain hafnium-doped lithium niobate thin films on sapphire {001} substrates. Niobium tetraethoxydimethylaminoethoxide (Nb(OEt)(4)(dmae)), lithium tert-butoxide (Li(OBut)), and hafnium tert-butoxide (Hf(OBut)(4)) were used as precursors. X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated that a single phase of textured {001} Hf-doped lithium niobate film was obtained under certain precursor flux conditions. The lithium content ([Li]/([Li] + [Nb])) of the textured film was estimated using Raman spectroscopy to be about 49 mol %. The presence of hafnium inside the films was confirmed by X-ray photoelectron spectroscopy (XPS) measurements, and the hafnium content of the textured film ([Hf]/([Hf] + [Nb])) was estimated to be about 3 mol %. XPS data confirmed that Hf and Nb, respectively, are in the +4 and +5 oxidation states inside the film. The film consists of nearly parallel {001} hafnium-doped lithium niobate columns with different in-plane orientations. |
| Databáze: | OpenAIRE |
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