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Optical properties of epitaxial BiFeO3 thin films |
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| Authors: | V ?elezny D Chvostová L Pajasová I Vrejoiu M Alexe |
| Institution: | (1) Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9466, Azadi Ave., Tehran, Iran;(2) Physics Department, Sharif University of Technology, P.O. Box 11365-9466, Azadi Ave., Tehran, Iran;(3) Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 14588-89694, Azadi Ave., Tehran, Iran |
| Abstract: | Optical properties of epitaxial BiFeO3 thin films grown via pulsed-laser deposition on (110) DyScO3 substrates have been investigated. Their near-normal spectroscopic reflectivity was measured in the spectral range 2 to 14 eV at room temperature, while spectroscopic ellipsometry in the spectral range 1–6 eV was measured in the temperature range from 300 to 775 K. The optical response functions have been calculated and a direct optical gap was determined varying from 2.75 to 2.70 eV in this temperature range. |
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