Study of the Effect of Thickness on the Optical Properties of MnBi0.95Sb0.05 Thin Film | ||||
| Sohag Journal of Sciences | ||||
| Volume 8, Issue 2, May 2023, Page 157-161 PDF (442.96 K) | ||||
| Document Type: Regular Articles | ||||
| DOI: 10.21608/sjsci.2023.179767.1046 | ||||
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| Authors | ||||
Esraa Y. Omar   ; A. M. Ahmed; A. K. Diab; H. F. Mohamed
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| Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt. | ||||
| Abstract | ||||
| MnBi0.95Sb0.05 alloys were prepared by the conventional melt technique and then deposited as a thin film by thermal evaporation technique with different thicknesses. The optical absorption, reflection, and transmission spectra of thin films were measured in the wavelength range of 250 nm to 2500 nm. In our work, MnBi0.95Sb0.05 thin films have a hexagonal structure (P63/mmc group). The optical properties are characterized by high absorption and reflection, as well as very low transmission. Besides that, the absorbance of MnBi0.95Sb0.05 films decreased with increasing thickness. The calculated energy gap of MnBi0.95Sb0.05 thin films depended on the film thickness. It decreases from 1.36V to 1.03V by increasing the thickness from 25nm to 75nm. Different optical parameters like n, k, and ϭopt are examined and discussed. | ||||
| Keywords | ||||
| MnBi0.95Sb0.05 thin films; thermal evaporation method; optical properties; optical band gap | ||||
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