Dielectric Property of Single Crystalline BaTi2O5 Prepared by a Floating Zone Method

Takaya Akashi, Hiroaki Iwata, Takashi Goto

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

Single crystalline BaTi2O5 was prepared by a floating zone method. The permittivity of single crystalline BaTi 2O5 perpendicular to a (010) plane showed the maximum value of 20500 at 748 K obeying the Curie-Weiss law at higher temperatures. The permittivity perpendicular to (100) and (001) planes were 140 and 70, respectively almost independent of temperature. A transition temperature measured by a dilatometer was in agreement with a Curie temperature. The relationship between polarization and electrical field perpendicular to the (010) plane showed ferroelectric hysteresis. No hysteresis was observed in the direction perpendicular to (100) and (001) planes. The electrical conductivity perpendicular to the (010) was larger than those of (100) and (001) planes. The activation energy of electrical conductivity was 147 to 180 kJ mol-1 independent of directions.

Original languageEnglish
Pages (from-to)1644-1646
Number of pages3
JournalMaterials Transactions
Volume44
Issue number8
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Anisotropy
  • BaTiO single crystal
  • Electrical conductivity
  • Hysteresis
  • Permittivity
  • Thermal expansion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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