Dielectric and Optical Studies of the Low-Temperature Phase in NaNbO_3: Effect of Manganese Dopant
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概要
- 論文の詳細を見る
Pure and Mn-doped NaNbO_3 crystals have been investigated dielectrically between 380 and 20 K. Below room temperature, no phase transition is observed in pure sodium niobate. With increasing Mn content, a structural phase transition is induced around 140 K. The dielectric constant shows a maximum for the sample with 0.7 wt.%, and shows large thermal hysteresis. In the low-temperature region, ferroelectric activities could not be detected in either pure or lightly doped NaNbO_3. The phase diagram of T_c vs the concentration of Mn is obtained. Domain motion associated with this phase transition is observed around the transition temperature. This evidence proved that the low-temperature phase is induced by light doping with Mn ions. The uniaxial stress decreases T_c;dT_c/dσ=-80 K/kbar on heating and -600 K/kbar on cooling.
- 社団法人応用物理学会の論文
- 1992-09-30
著者
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Onodera Akira
Department of Physics, Faculty of Science, Hokkaido University
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Yamashita Haruyasu
Department of Electronics and Information Engineering, Faculty of Engineering, Hokkai-Gakuen Univers
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Onodera Akira
Department Of Molecular Life Science Tokai University School Of Medicine
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MOLAK Andrzej
Department of Physics, Faculty of Science, Hokkaido University
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Molak Andrzej
Department Of Physics Faculty Of Science Hokkaido University:(present Address) Institute Of Physics
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Yamashita Haruyasu
Department Of Electronics And Information Engineering Faculty Of Engineering Hokkai-gakuen Universit
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