resumo
Here we present the results of the study of electromechanical performance of the Ce0.8Gd0.2O1.95 (CGO) self-supported thin circular membranes with aluminum and titanium as contact electrode materials. The electromechanical performance of both membranes was investigated using highly sensitive interferometric technique and showed two principal excitations mechanisms: common electrostriction and thermal contribution due to the Joule heating. Operating the membranes at frequencies about MHz results in significant contribution of the thermal excitation due to a large power dissipation for every electrode. The excitation of the membrane with aluminum electrodes at the frequencies about 1 Hz leads to the formation of the Schottky barrier at the interface with CGO. That is why the electromechanical response was almost independent on frequency and electric field. Membrane with titanium electrodes showed a prevalence of electrostriction effect with weak frequency dispersion and significant enhancement of the response with temperature.
palavras-chave
ELECTROSTRICTION; FILMS
categoria
Materials Science; Microscopy
autores
Ushakov, AD; Mishuk, E; Alikin, DO; Slautin, BN; Esin, AA; Baturin, IS; Shur, VY; Lubomirsky, I; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador Principal
Denis Alikin
Investigador Auxiliaragradecimentos
The equipment of the Ural Center for Shared Use "Modern Nanotechnology" UrFU has been used. The research was made possible in part by RFBR (Grant No. 15-52-06006 MNTI_a). This work was supported by the Israeli Ministry of Science and Technology within the program of Israel-Russian Federation Scientific Collaboration, Grant No. 12421-3. This work has been supported in part by the Ministry of Education and Science of the Russian Federation under Project No. 3.9534.2017/BP.