Anomalous Dielectric Behavior in A-site Ordered Perovskite CaCu^sub 3^Ti^sub 4^O^sub 12^ : Effect of A'-site Doping
The effect of partial replacement of Cu ions by small Be cations with no d-electrons in ... ceramics was studied over the temperature range from 90 K to 800 K. Dielectric constant of ... decreases exponentially with increasing x as e' =4000 + exp(-x/0.023); by 5% of Be-doping, the relaxation ti...
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| Published in: | Ferroelectrics Vol. 485; no. 1; p. 129 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
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Taylor & Francis Ltd
01-01-2015
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| Abstract | The effect of partial replacement of Cu ions by small Be cations with no d-electrons in ... ceramics was studied over the temperature range from 90 K to 800 K. Dielectric constant of ... decreases exponentially with increasing x as e' =4000 + exp(-x/0.023); by 5% of Be-doping, the relaxation time and activation energy decrease to values of 50% and 92% compared with those in pure CCTO, respectively. The weakened hybridization in Cu-O bonds by Be-doping suppresses dielectric properties. This evidence indicates that the role of A'-site ions is important for anomalous dielectric response in ... at high temperatures. (ProQuest: ... denotes formulae/symbols omitted.) |
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| AbstractList | The effect of partial replacement of Cu ions by small Be cations with no d-electrons in ... ceramics was studied over the temperature range from 90 K to 800 K. Dielectric constant of ... decreases exponentially with increasing x as e' =4000 + exp(-x/0.023); by 5% of Be-doping, the relaxation time and activation energy decrease to values of 50% and 92% compared with those in pure CCTO, respectively. The weakened hybridization in Cu-O bonds by Be-doping suppresses dielectric properties. This evidence indicates that the role of A'-site ions is important for anomalous dielectric response in ... at high temperatures. (ProQuest: ... denotes formulae/symbols omitted.) |
| Author | Sasaki, Masataka Satoh, Hiroyasu Takesada, Masaki Hasegawa, Nao Hattori, Takahiro Onodera, Akira |
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| Snippet | The effect of partial replacement of Cu ions by small Be cations with no d-electrons in ... ceramics was studied over the temperature range from 90 K to 800 K.... |
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| SubjectTerms | Ceramics Dielectric properties Ferroelectrics Ions Perovskite Semiconductor doping Temperature effects |
| Title | Anomalous Dielectric Behavior in A-site Ordered Perovskite CaCu^sub 3^Ti^sub 4^O^sub 12^ : Effect of A'-site Doping |
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