The structural studies and optical characteristics of phase-segregated Ir-doped LuFeO3-delta films

0570601 - ÚFM 2024 RIV DE eng J - Journal Article
Polat, O. - Coskun, F. M. - Yildirim, Y. - Sobola, Dinara - Ercelik, M. - Arikan, M. - Coskun, M. - Sen, C. - Durmus, Z. - Caglar, Y. - Caglar, M. - Turut, A.
The structural studies and optical characteristics of phase-segregated Ir-doped LuFeO3-delta films.
Applied Physics A - Materials Science & Processing. Roč. 129, č. 3 (2023), č. článku 198. ISSN 0947-8396. E-ISSN 1432-0630
Research Infrastructure: CzechNanoLab - 90110
Institutional support: RVO:68081723
Keywords : Thin film * LuFeO3 * Ir substitution * Band gap modification * Optical dielectric constant * Optical conductivity * Photoluminescence * Raman
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.7, year: 2022
Method of publishing: Limited access
https://link.springer.com/article/10.1007/s00339-023-06486-4

In this work, we carefully examined how Ir substitution into Fe sites can change the band of the LuFeO3 (LFO) material. LFO and Ir-doped LFO (LuFe1-xIrxO3 or LFIO for short, where x = 0.05 and 0.10) thin films were synthesized by utilizing magnetron sputtering techniques. The films were grown on silicon and indium tin oxide (ITO) substrates at 500 degrees C. The crystallographic orientation of the films was examined using X-ray diffraction (XRD) analysis. The crystallographic orientation of the thin films was examined using an X-ray diffractometer (XRD). For surface topography research, atomic force microscopy (AFM) was employed. To look for the recombination of photogenerated electron-hole pairs in the materials under investigation, photoluminescence (PL) spectroscopy was used. Raman spectroscopy is then utilized to gather data on crystal symmetry as well as disorders and defects in the oxide materials. It was demonstrated that the LFO band gap was altered from 2.35 to 2.72 eV by Ir substitution into Fe sites. Moreover, diffuse reflectance spectroscopy (DRS) was used to analyze conductivity, real and imaginary components of the dielectric constant, refractive index (n), extinction coefficient (k), and reflectance percentage.
Permanent Link: https://hdl.handle.net/11104/0342393