Synthesis, magnetism, and electrical properties of La1-xBaxTiO3 (0.0 ≤ x ≤ 0.5)

Joseph E. Sunstrom IV, Susan M. Kauzlarich

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

The study of cation substitution in transition-metal oxides provides fundamental information needed to understand such phenomena as high-Tc superconductivity and magnetic order in oxide materials. The solid solution La1-xBaxTiO3 (0.0 ≤ x ≤ 0.5) has been prepared by arc melting stoichiometric amounts of LaTiO3 and BaTiO3 under argon. Single-phase samples can be made for the stoichiometry range studied here. The polycrystalline samples have been characterized using electron microprobe, thermal gravimetric analysis, temperature- and field-dependent magnetization, and dc resistivity. The stoichiometries determined by microprobe agree well with the theoretical stoichiometries. LaTiO3 is a canted antiferromagnet which shows a net ferromagnetic ordering at 150 K. The ferromagnetic order is destroyed with the addition of 5 % BaTiO3. All of the La1-xBaxTiO3 (x > 0) samples exhibit temperature-independent magnetism in the high-temperature (160-300 K) range and paramagnetism in the low temperature (<50 K) region. The La1-xBaxTiO3 samples display poor metallic conductivity. In addition, several random samples display a sharp drop in resistivity which is reminiscent of PTCR thermistor behavior.

Original languageEnglish (US)
Pages (from-to)1539-1544
Number of pages6
JournalChemistry of Materials
Volume5
Issue number10
StatePublished - 1993

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

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    Sunstrom IV, J. E., & Kauzlarich, S. M. (1993). Synthesis, magnetism, and electrical properties of La1-xBaxTiO3 (0.0 ≤ x ≤ 0.5). Chemistry of Materials, 5(10), 1539-1544.