Microstructures in Complex Perovskite (Li1/2Ln1/2)TiO3 (Ln = Pr, Nd, Sm)

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概要

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• Microstructural characterizations of (Li1/2Ln1/2)TiO3 (Ln = Pr, Nd, Sm) systems were carried out using transmission electron microscopy. Cuboidal grains of ${\sim}2.5$ 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.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2004-11-15

著者

• SON Jin

  Division of Materials and Metallurgical Engineering, Korea University

• Park Hyun

  New Materials Evaluation Center Korea Research Institute Of Standards And Science

• Oh Sang

  New Materials Evaluation Center Korea Research Institute Of Standards And Science

• Cho Yang

  New Materials Evaluation Center Korea Research Institute Of Standards And Science

• Lee Hwack

  New Materials Evaluation Center Korea Research Institute Of Standards And Science

• Nahm Sahn

  Division Of Materials And Metallurgical Engineering Korea University

• Oh Sang

  New Materials Evaluation Center, Korea Research Institute of Standards and Science, Daeduk Science Town, Daejon 305-340, Korea

• Son Jin

  Division of Materials and Metallurgical Engineering, Korea University, Seoul 136-701, Korea

• Cho Yang

  New Materials Evaluation Center, Korea Research Institute of Standards and Science, Daeduk Science Town, Daejon 305-340, Korea

• Nahm Sahn

  Division of Materials and Metallurgical Engineering, Korea University, Seoul 136-701, Korea

• Lee Hwack

  New Materials Evaluation Center, Korea Research Institute of Standards and Science, Daeduk Science Town, Daejon 305-340, Korea

関連論文

• Microstructures in Complex Perovskite (Li_Ln_)TiO_3 (Ln = Pr, Nd, Sm)
• Microstructural Changes in (1-x)Nd_TiO_3-xNdAlO_3 System
• Partial Melting of Yttrium-Excess YBa_2Cu_3O_y Superconductors
• Microstructures in Complex Perovskite (Li1/2Ln1/2)TiO3 (Ln = Pr, Nd, Sm)

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