| Title |
The electrical and microstructural properties of Zr-doped LaNbO4 thin ceramic films / |
| Another Title |
Lantano niobio oksido plonų keraminių sluoksnių legiruotų cirkoniu elektrinės savybės ir mikrostruktūra. |
| Authors |
Virbukas, Darius ; Bočkutė, Kristina ; Laukaitis, Giedrius |
| DOI |
10.5755/j01.ms.21.3.9535 |
| Full Text |
|
| Is Part of |
Materials science = Medžiagotyra.. Kaunas : KTU. 2015, vol. 21, no. 3, p. 439-443.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
complex electrochemical impedance spectroscopy ; magnetron sputtering ; thin films ; LaNbO4 |
| Abstract [eng] |
In the current research thin Zr-doped lanthanum niobium oxide (LaNb1-xZrxO4) films deposited by magnetron sputtering were studied to investigate their microstructural and electrical properties. The main attention is paid to the electrical processes in the formed thin films, e.g. relaxation time and activation energy derived from the different electrical parameters. X-ray diffractometry, energy-dispersive X-ray spectroscopy and scanning electron microscopy were used to study the structure and composition of the films. Electrical parameters of LaNb1-xZrxO4 thin ceramic were investigated by impedance spectroscopy in the frequency range from 0.1 Hz to 1.0 MHz in temperature range from 773 to 1173 K. It is shown that LaNb1-xZrxO4 thin ceramic films have nanocrystalline structure with characteristic peaks corresponding to the tetragonal LaNbO4 structure. The increase of Zr dopants does not influence the tetragonal structure. It was revealed that the Non-Debye relaxation process is dominant in the formed thin films and the activation energy is dependent on the concentration of the dopants. The comparison between the activation energies estimated using different electrical parameters: electrical modulus, impedance imaginary part and slope from the conductivity plot was made. Also the relaxation time was calculated. The relaxation time varies from from 2.80·10-4 s to 3.78·10-5 s in the formed thin films. |
| Published |
Kaunas : KTU |
| Type |
Journal article |
| Language |
English |
| Publication date |
2015 |
| CC license |
|
