Microstructures in complex perovskite (Li1/2Ln 1/2)TiO3 (Ln = Pr, Nd, Sm)

Hwack Joo Lee, Hyun Min Park, Sang Ho Oh, Yang Koo Cho, Jin Ok Son, Sahn Nahm

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Microstructural characterizations of (Li1/2Ln 1/2)TiO3 (Ln = Pr, Nd, Sm) systems were carried out using transmission electron microscopy. Cuboidal grains of ∼2.5 μm mean size with internal fine structures are dominant. Antiphase boundaries (APBs) and ferroelastic domains are found among the internal fine structure. The APBs originate from the superlattice reflections of (1/2)(001) observed in three systems and (1/2)(111) NaCl-type ordering of Pr3+ or Nd3+ and Li1+ or vacancy in LPT and LNT. However, in LST, (1/2)(111) ordering is absent. The ferroelastic domains are formed by the antiphase and in-phase tilting of oxygen octahedra and the antiparallel shifts of A-site cations. Also, more complex structural changes such as spinodal decomposition are involved in the phase transitions in these systems.

Original languageEnglish
Pages (from-to)7592-7595
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number11 A
DOIs
Publication statusPublished - 2004 Nov

Keywords

  • (LiLn)TiO (Ln = Pr, Nd, Sm)
  • Antiphase boundaries
  • Ferroelastic domain boundaries
  • Microstructures
  • Structure modulations
  • Tilting of oxygen octahedron

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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