DC and AC conductivity measurements of Bi12TiO20 photorefractive crystals doped with Ag, P, Cu and Cd

Vera Marinova*, Ventseslav Sainov, Shiuan-Huei Lin, Ken-Yuh Hsu

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Bi12TiO20 single crystals nominally pure and doped with silver, phosphor, copper and cadmium are grown using the top seeded solution growth method (TSSG). The DC conductivity followed the Arrhenius law, with activation energies 0.4-0.82 eV for investigated crystals. The real and imaginary parts of AC conductivity are measured in the temperature range 300-550 K and frequency range 10 kHz-1 MHz. The imaginary part possesses linear frequency dependence in whole temperature range for all samples and is one to two orders of magnitude larger in comparison to the real part. According to the frequency and temperature analysis of conductivity it is established that transport mechanism in doped BTO crystals is due to charge carriers hopping between defect sites.

Original languageEnglish
Pages (from-to)1860-1863
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number3 B
DOIs
StatePublished - 1 Mar 2002

Keywords

  • Dark conductivity
  • Doping elements
  • Electrical properties
  • Photorefractrive materials
  • Single crystals
  • Transport mechanism

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