Dielectric properties and phase transition in CaCU3Ti4O12 at high temperatures

被引：25

作者：

Onodera, Akira ^{[1
]}

Takesada, Masaki ^{[1
]}

Kawatani, Keiichi ^{[1
]}

Hiramatsu, Shogo ^{[1
]}

机构：

[1] Hokkaido Univ, Fac Sci, Dept Phys, Sapporo, Hokkaido 0600801, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2008年 / 47卷 / 09期

关键词：

CaCU3Ti4O12; giant susceptibility; phase transition; perovskite;

D O I：

10.1143/JJAP.47.7753

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dielectric properties, and structural behavior of perovskite-related CaCu3Ti4O12 were studied at high temperatures. The dielectric constant increase gradually with incrreasing temperature and shows a shoulder-like round anomaly at approximately 630K at 10 kHz. At 732K a new dielectric anomaly was found, where the peak value of the dielectric constant epsilon peak similar or equal to 2.8 x 10(6) at a frequency of 10 kHz. The lattice constant and X-ray intensity of the (880) reflection also exhibit an anomaly at 732K. These findings indicate that CaCu3Ti4O12 undergoes a structural phase transition at 732K.

引用

页码：7753 / 7756

页数：4

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