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Sol-gel route to nanocrystalline Eu2Ti2O7 films with tailored structural and optical properties
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SYSNO ASEP 0518376 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Sol-gel route to nanocrystalline Eu2Ti2O7 films with tailored structural and optical properties Author(s) Mrázek, Jan (URE-Y) RID, ORCID
Vytykáčová, Soňa (URE-Y)
Buršík, Jiří (UFM-A) RID, ORCID
Puchý, V. (SK)
Girman, V. (SK)
Peterka, Pavel (URE-Y) RID
Kašík, Ivan (URE-Y) RIDNumber of authors 7 Source Title Journal of the American Ceramic Society. - : Wiley - ISSN 0002-7820
Roč. 102, č. 11 (2019), s. 6713-6723Number of pages 11 s. Publication form Print - P Language eng - English Country US - United States Keywords rare earths ; optical materials/properties ; sol-gel ; thin films Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) Subject RIV - cooperation Institute of Physics of Materials - Solid Matter Physics ; Magnetism R&D Projects LD15122 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support URE-Y - RVO:67985882 ; UFM-A - RVO:68081723 UT WOS 000484534300036 EID SCOPUS 85065970580 DOI 10.1111/jace.16524 Annotation We present a generic sol-gel approach for the preparation of highly transparent europium titanate Eu2Ti2O7 films with tailored structural and optical properties. The films were prepared by a sol-gel process and thermally treated in a rapid thermal annealing furnace. We determined the effects of the annealing temperature on structural, morphological, and optical properties of the films. We evaluated film's optical constants. The size of the primary nanocrystals and the film's refractive index were tailored by the annealing temperature. The crystallization of Eu2Ti2O7 started at 800 degrees C and the nanocrystals grew with increasing annealing temperature reaching the size from 20 nm to 100 nm. The energy of nanocrystal growth was 21 +/- 3 kJ center dot mol(-1). Increasing nanocrystal size caused the regular growth of the refractive index recorded at 632 nm from 2.07 to 2.17 for the films annealed at 800 degrees C and 1200 degrees C, respectively. These results provide fundamental information about the effects of the structure and the morphology of the films on their optical properties. The presented approach can be extended to other rare earth-doped titanates and these films can be used as passive protective coatings as well as active materials suitable for photonic and spintronic applications Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2020 Electronic address https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/jace.16524
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