Local Structure Analysis of Cubic Perovskite CaCu₃Ti₄O₁₂

• Yoneda Yasuhiro

  Japan Atomic Energy Agency (JAEA), Synchrotron Radiation Research Unit

• Yoshii Kenji

  Japan Atomic Energy Agency (JAEA), Synchrotron Radiation Research Unit

• Hayakawa Hironori

  Department of Physics, Okayama University

• Ikeda Naoshi

  Department of Physics, Okayama University

抄録

Recently, there has been considerable interest in the dielectric properties of the cubic perovskite CaCu₃Ti₄O₁₂. The material has shown to have relatively high temperature independent dielectric permittivity over a wide temperature range from 100 K to 600 K. Below ～ 100 K the permittivity drops by almost three orders of magnitude, but is not accompanied by a structural phase transition. We studied CaCu₃Ti₄O₁₂ hoping to find signatures of local structural distortions that may explain the observe anomalies in the dielectric properties. Experiments were carried out using synchrotron radiation at several temperatures between room temperature and 10 K. Reconsideration is necessary for interpreting a huge permittivity by the local disorder model.

収録刊行物

• Transactions of the Materials Research Society of Japan

  Transactions of the Materials Research Society of Japan 34 (1), 15-18, 2009

  一般社団法人 日本MRS

キーワード

• pair-distribution function
• synchrotron X-ray diffraction
• CaCu₃Ti₄O₁₂

詳細情報

• CRID: 1390001205513416192
• NII論文ID: 130005003911
• DOI: 10.14723/tmrsj.34.15
• COI: 1:CAS:528:DC%2BD1MXmsFWgurg%3D
• ISSN: 21881650
• ISSN: 13823469
• 本文言語コード: ja
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可