Metallization of La1/3NbO3 by lithium incorporation

A. Yamamoto, H. Uchiyama, S. Tajima

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Lithium ion was successfully introduced into La1/3NbO 3 with an A-site-deficient perovskite-type structure. The crystal structure and transport properties of La1/3LixNbO 3 were investigated as a function of Li content (x = 0-0.59). The lattice parameters of La1/3LixNbO3 with an orthorhombic cell were enlarged with increasing Li content for x ≤ 0.3, and the structure was transformed to a pseudo-tetragonal cell for x = 0.44. The temperature dependence of electrical resistivity gradually changed from insulating to metallic with increasing x, and thermoelectric power measurement indicated that the carriers were electrons. In X-ray photoelectron spectra of the incorporated samples, Nb3d4+ peaks appeared in addition to Nb3d5+ peaks, which was consistent with the change of the transport properties. In spite of the success of metallization, no diamagnetic signal indicative of supercondcutivity was observed in La 1/3Li0.59NbO3 down to 1.8K.

Original languageEnglish
Pages (from-to)1691-1699
Number of pages9
JournalMaterials Research Bulletin
Volume39
Issue number11
DOIs
Publication statusPublished - 2004 Sep 1
Externally publishedYes

Keywords

  • A. Oxides
  • C. Photoelectron spectroscopy
  • D. Crystal structure
  • D. Electrical properties

ASJC Scopus subject areas

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

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