Synthesis and electrical properties of (La1-xMx)3Ni2TaO9 (M = Ca, Sr)

Sumio Kato, Takao Sakamoto, Norihito Watanabe, Mikio Sugai, Yozo Ohshima, Hirotsugu Takizawa, Masahiko Shimada

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1 Citation (Scopus)

Abstract

Perovskite related compounds, (La1-xMx)3Ni2TaO9 (M = Ca, Sr), were synthesized by the metal nitrate decomposition method. Single-phase solid solutions were obtained in the composition range 0≤x≤0.20 in both (M = Ca, Sr) systems. The crystal structure of the solid solutions is slightly distorted (NH4)3FeF6-type structure. All the solid solutions exhibit p-type behavior with activation energies in the range from 0.13 to 0.22 eV. The value of the Seebeck coefficient of the solid solutions indicates the existence of hole carriers. The behavior of the compositional dependence of the unit cell volume indicates the presence of Ni3+ ions.

Original languageEnglish
Pages (from-to)101-104
Number of pages4
JournalMaterials Letters
Volume21
Issue number1
DOIs
Publication statusPublished - 1994 Jan 1

ASJC Scopus subject areas

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

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