Electrical properties of Mg-doped LiTaO3 ceramics

A. Huanosta*, E. Alvarez, M. E. Villafuerte-Castrejón, A. R. West

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The ac impedance of ceramic samples of Mg-doped LiTaO3 has been measured over the temperature range 600-800 °C. It can be modelled by an equivalent circuit composed of a "dielectric element" R 1C1C2 in parallel with a "leakage resistance" R2. The series component R1C1, represents the polarisation associated with domain reorientation: C1 passes through a maximum at Tc at the same time as R1 passes through an approximate minimum. C2 represents the bulk polarisation, R2 shows linear Arrhenius behaviour. The solid solution were characterised by XRD and the formation mechanism was proposed. The variation of electrical properties with composition is discussed.

Original languageEnglish
Pages (from-to)2229-2240
Number of pages12
JournalMaterials Research Bulletin
Volume39
Issue number14-15
DOIs
StatePublished - 2 Dec 2004
Externally publishedYes

Keywords

  • A. Ceramics
  • A. Oxides
  • B. Chemical synthesis
  • C. X-ray diffraction
  • D. Crystal structure
  • D. Dielectric properties

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