Low-Temperature Dielectric Response of Strontium Titanate Thin Films Manipulated by Zn Doping.
Materials (Basel)
; 15(3)2022 Jan 23.
Article
in En
| MEDLINE
| ID: mdl-35160804
ABSTRACT
The voltage dependence of the dielectric permittivity ε' and the low dielectric loss tanδ of incipient ferroelectrics have drawn vast attention to the use of these materials for the development of tuning elements in electronics and telecommunications. Here, we study the DC electric field dependence of low-temperature ε' in ~320 nm thick sol-gel-derived SrTi1-xZnxO3-δ thin films with x = 0.01 and 0.05, deposited on Pt/TiO2/SiO2/Si substrates. Incorporation of Zn onto Ti sites is found to decrease ε' compared to undoped SrTiO3 films, while increasing the relative tunability nr up to ~32.9% under a DC electric field of 125 kV/cm at low temperatures. The hysteresis-free variation in ε' with electric field and tanδ values below 0.6% observed for SrTi1-xZnxO3-δ film with x = 0.01 make this compound more attractive for tunable device applications.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Materials (Basel)
Year:
2022
Document type:
Article
Affiliation country:
Portugal