Thermally stimulated currents in amorphous barium titanate thin films deposited by rf magnetron sputtering

Abstract

Dielectric relaxation study of amorphous TiTaO thin films in a large operating temperature range

Dielectric response and thermally stimulated depolarization current analysis of BaNd1.76Bi0.24Ti5O14 high-temperature microwave capacitors

“…generally forms the defect dipoles in titanate materials and the Ti 3? -V O defect dipole has activation energy of about 0.72 eV [23]. However, the obtained activation energy ranging 0.88-0.95 eV for the relaxation peak A is slightly higher than these reported values, which can be attributed to the difference of crystal structure and surrounding ions.…”

“…c TSDC peak density (J max ) versus relaxation peak temperature (T m ) under different T p and E p . These data are based on TSDC measurement results [23,24]. Additionally, the possibility of peak A is associated with the dipolar relaxation.…”

“…TSDC may also be used to evaluate the activation energy of relaxation, relaxation time and the defect concentration, which enables a better understanding of the physical phenomena related to such defects [10,11,[15][16][17][18]. TSDC is frequently used to analyze polymer materials; however, TSDC is yet to be extensively employed on microwave dielectrics [16][17][18][19][20][21][22][23][24]. The measurement of TSDC spectra is briefly described as follows [17][18][19][20].…”

“…[16][17][18][19][20][21][22][23][24]. TSDC may also be used to evaluate the activation energy of relaxation, relaxation time and the defect concentration, which enables a better understanding of the physical phenomena related to such defects [10,11,[15][16][17][18].…”

Thermally stimulated depolarization currents and dielectric properties of Mg0.95Ca0.05TiO3 filled HDPE composites

“…On the other hand, peak B could not be induced until T p is elevated to 300 • C and its intensity increases drastically with higher T p. The position of peak B shifts to higher temperature range under stronger polarization condition, accompanied by the dramatic increase of current density, which is the symbol of polarization owing to the migration of oxygen vacancies. 16,24 TSDC measurements of pure HDPE were first carried out at a fixed Ep=200V/mm. As is shown in Fig.…”