| Temperature- and Frequency-Dependent Dielectric Properties of La1.5Sr0.5NiO4-δ |
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| 引用本文： | 马永昌,张建柱,赵捷,刘庆锁.Temperature- and Frequency-Dependent Dielectric Properties of La1.5Sr0.5NiO4-δ[J].中国物理快报,2010,27(8):218-221. |
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| 作者姓名： | 马永昌 张建柱 赵捷 刘庆锁 |
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| 作者单位： | [1]School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384 [2]Key Laboratory of Display Materials and Photoelectric Devices （Ministry of Education）, Tianjin University of Technology, Tianjin 300384 [3]Tianjin Key Lab for Photoelectric Materials and Devices, Tianjin 300384 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10704054, the Tianjin Key Project for Materials Physics and Chemistry, the Project of National Innovation Experiment Program for University Students. |
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| 摘 要： | We report the temperature-dependent resistivity and dielectric function （1 kHz- 3 MHz） of a charge ordering system La1.5Sr0.5NiO4-δ. The primary data of ac impedance was measured by a four-terminal pair arrangement. Above 180K, the resistivity is independent of frequency. At lower temperatures, the dielectric function couM not be fitted by a Debye model with a single relaxation time, it should have a distribution. At T = 130 K, there is a sudden increase in the p - T relation, meanwhile an anomaly dielectric response occurs on the temperature dependant dielectric spectrum in the whole measured frequency range, in which the dielectric constant has a high value even at high frequency region. Our analysis suggests that the current system would be more consistent with the Zener polaron model.
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| 关 键 词： | 介电性能 温度相关 率相关 和频 频率范围 温度依赖性 介电常数 交流阻抗 |
| 收稿时间： | 2009-12-9 |
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