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

doi:10.1143/JJAP.43.7592

Microstructures in complex perovskite (Li_1/2Ln _1/2)TiO₃ (Ln = Pr, Nd, Sm)

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Microstructural characterizations of (Li_1/2Ln _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 language	English
Pages (from-to)	7592-7595
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	43
Issue number	11 A
DOIs	https://doi.org/10.1143/JJAP.43.7592
Publication status	Published - 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)

Access to Document

10.1143/JJAP.43.7592

Cite this

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

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.",

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

author = "Lee, {Hwack Joo} and Park, {Hyun Min} and Oh, {Sang Ho} and Cho, {Yang Koo} and Son, {Jin Ok} and Sahn Nahm",

year = "2004",

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doi = "10.1143/JJAP.43.7592",

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AU - Lee, Hwack Joo

AU - Park, Hyun Min

AU - Oh, Sang Ho

AU - Cho, Yang Koo

AU - Son, Jin Ok

AU - Nahm, Sahn

PY - 2004/11

Y1 - 2004/11

N2 - 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.

AB - 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.

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