| Autor: |
Apostolova, I. N., Apostolov, A. T., Wesselinowa, J. M. |
| Předmět: |
|
| Zdroj: |
Journal of Applied Physics; 11/7/2021, Vol. 130 Issue 17, p1-6, 6p |
| Abstrakt: |
We have calculated the phonon energy and damping of ω 0 = 264 cm − 1 in Fe, Mn, and Dy doped BaTiO 3 using a microscopic model. By doping with Fe ions, the phonon energy ω and damping γ show anomalies at the two phase transition temperatures. ω increases whereas γ decreases with the increase in the magnetic field and the kink at T C f m vanishes. ω and T C f e decrease or increase with the increase in Mn or Fe dopants, respectively. T C f e and ω of ω 0 = 718 cm − 1 decrease with the increase in Dy ion doping on the Ba site. γ is enhanced for all three ions. The changes in the phonon properties by ion doping are due to the different strain caused by the different ionic radii of the host and doping ions. The effects of Fe, Mn, and Sm doping on the bandgap energy are also discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
