Journal of Alloys and Compounds, volume 976, pages 173255

Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)

Zhukova Elena S. 1
, 
Nekrasov Boris M 1
, 
Tyunina M. 2, 3
, 
Vetokhina V 3
, 
Kocourek T. 3
, 
de Prado Esther 3
, 
Stolyarov V. S. 4, 5, 6
, 
Frolov Alexander S 6
, 
Melentev A V 1
, 
Savinov Maxim 3
, 
Bush Alex 7
, 
Kozlov Vladislav I 7, 8
, 
Talanov M. V. 1
, 
Gorshunov B.P. 1
1
 
2
 
3
 
Institute of Physics of the Czech Academy of Sciences, Prague, 18221, Czech Republic | 
4
 
5
 
6
 
7
 
8
 
Publication type: Journal Article
Publication date: 2024-03-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 6.2
ISSN: 09258388
Materials Chemistry
Metals and Alloys
Mechanical Engineering
Mechanics of Materials
Abstract
Systematic study of the terahertz soft-mode in SrTiO3: M thin (150 nm) films doped (2 at.%) with transition metals M = Mn, Fe, Ni, Co is performed at frequencies 7–1000 cm−1 and temperatures 5–300 K. The soft mode dielectric strength and frequency follow the Barrett-like temperature behaviours with unusually high quantum temperatures and large in magnitude negative Curie temperatures, indicating strong destabilization of the ferroelectric state due to a combined effect of quantum fluctuations, dead layers at the boundaries of crystallites, misfit strains within crystallites and disorder induced by doping. Dopant-dependent variation in the asymmetry of the Fano resonance describing coupling of the TO2 phonon and continuum states of polarization fluctuations is observed suggesting presence of polar nanoregions in the films. Clear correlation between the asymmetry parameter and the Barrett quantum temperature is observed that highlights the complex character of the local structure-dielectric properties relationships in the films.
By date By citations
Metrics
Share
Cite this
GOST |
Cite this
GOST Copy
Zhukova E. S. et al. Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co) // Journal of Alloys and Compounds. 2024. Vol. 976. p. 173255.
GOST all authors (up to 50) Copy
Zhukova E. S., Nekrasov B. M., Tyunina M., Vetokhina V., Kocourek T., de Prado E., Stolyarov V. S., Frolov A. S., Melentev A. V., Savinov M., Bush A., Kozlov V. I., Talanov M. V., Gorshunov B. Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co) // Journal of Alloys and Compounds. 2024. Vol. 976. p. 173255.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1016/j.jallcom.2023.173255
UR - https://doi.org/10.1016%2Fj.jallcom.2023.173255
TI - Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)
T2 - Journal of Alloys and Compounds
AU - Zhukova, Elena S.
AU - Nekrasov, Boris M
AU - Tyunina, M.
AU - Vetokhina, V
AU - Kocourek, T.
AU - de Prado, Esther
AU - Stolyarov, V. S.
AU - Frolov, Alexander S
AU - Melentev, A V
AU - Savinov, Maxim
AU - Bush, Alex
AU - Kozlov, Vladislav I
AU - Talanov, M. V.
AU - Gorshunov, B.P.
PY - 2024
DA - 2024/03/01 00:00:00
PB - Elsevier
SP - 173255
VL - 976
SN - 0925-8388
ER -
BibTex
Cite this
BibTex Copy
@article{2024_Zhukova,
author = {Elena S. Zhukova and Boris M Nekrasov and M. Tyunina and V Vetokhina and T. Kocourek and Esther de Prado and V. S. Stolyarov and Alexander S Frolov and A V Melentev and Maxim Savinov and Alex Bush and Vladislav I Kozlov and M. V. Talanov and B.P. Gorshunov},
title = {Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)},
journal = {Journal of Alloys and Compounds},
year = {2024},
volume = {976},
publisher = {Elsevier},
month = {mar},
url = {https://doi.org/10.1016%2Fj.jallcom.2023.173255},
pages = {173255},
doi = {10.1016/j.jallcom.2023.173255}
}
Found error?