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Study on Polarization Properties of BaTiO3by Using Thermally Stimulated Depolarization Current

열자극 탈분극전류 방법에 의한 BaTiO3의 분극 특성 연구

  • 송호준 (한국기초과학지원연구원 광주분소) ;
  • 이용렬 (전남대학교 치과대학 치과재료학교실 및 치과재료연구소) ;
  • 박영준 (전남대학교 치과대학 치과재료학교실 및 치과재료연구소)
  • Published : 2002.08.01

Abstract

The polarization properties of $BaTiO_3$ were investigated by using thermally stimulated depolarization current (TSDC) technique. Two peaks were observed at about 400 K (peak A) and 435 K (peak B) from TSDC spectra obtained from the temperature range of 280-500 K. Peak A shows a sharp decrease of TSDC due to extinction of spontaneous polarization above the phase transition temperature of $BaTiO_3$. The values of activation energy of peak A and peak B were calculated to be 0.70 eV and 0.87 eV respectively. From the results of TSDC measurement with a variation of polarizing electric field strength, we found that saturation of total current of TSDC was started from 3kV/cm. However, the amount of total current of TSDC was not affected by the variation of polarizing time.

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  1. Effects of Mn-doping on TSDC and degradation of BaTiO3 vol.17, pp.2-4, 2006, https://doi.org/10.1007/s10832-006-5180-4