Diffuse Phase Transition in Potassium Lithium Niobate Ferroelectric Crystals : Condensed Matter Electronic Properties, etc.
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概要
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The tungesten-bronze type ferrpelectric potassium lithium niobate (KLN) crystals were grown by the Czochralski technique. In order to obtain a crystal with high quality and crack free, crystal growth is performed in two orientations along c and a-axis. We have subjected these crystal to X-ray diffraction studies and found that they are single-crystalline and belong to the tetragonal system with the lattice constants a = b = 1.2500 nm and c = 0.3996 nm. The spontaneous polarization, DSC and dielectric constant were measured in the temperature range between 30℃ and 700℃. The diffuse dielectric anomaly was observed for these KLN crystals. The phase transition temperature and diffuseness of phase transition are different at several crystals. These behaviors are explained by DPT, it means that the compositional fluctuation and cation distribution has a strong influence on the ferroelectric properties. Diffuse phase transition establishing the influence of composition on structure and dielectric properties are presented and discussed.
- 社団法人日本物理学会の論文
- 2000-06-15
著者
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KIM Jin
Departments of Surgery, Seoul National University College of Medicine
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Kim Jin
Institute Of Basic Science University Of Ulsan
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Kim J
Department Of Physics Pusan National University
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KIM Jung-Nam
Department of Physics,Pusan National University
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Kim Jin
Department Of Anatomy And Cell Biology College Of Veterinary Medicine And Bk21 Program For Veterinar
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Kim J
Institute Of Basic Science University Of Ulsan
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Kim Jung-Nam
Department of Physics, Pusan National University
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