New ferroelectric BaTi2O5

被引：108

作者：

Akishige, Y ^{[1
]}

Fukano, K ^{[1
]}

Shigematsu, H ^{[1
]}

机构：

[1] Shimane Univ, Fac Educ, Matsue, Shimane 6908504, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2003年 / 42卷 / 8A期

关键词：

BaTi2O5; high Curie temperature; high dielectric constant; ferroelectrics; D-E loop; space group;

D O I：

10.1143/JJAP.42.L946

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A needle-shaped BaTi2O5 crystal was grown from a Ti-rich solution. The chemical composition of the crystal was analyzed by an electron probe micro-analyzer (EPMA). X-ray Weissenberg photographs were taken at room temperature (RT): the crystal is monoclinic with a = 16.91 Angstrom, b = 3.94 Angstrom, c = 9.49 Angstrom, beta = 103.0degrees and Z = 6. A broad and large dielectric anomaly reaching 30,000 was observed at 430degreesC for the dielectric constant along the b-axis. Also, spontaneous polarization was estimated to be approximately 7 muC/cm(2) from the D-E loops at RT. Thus the crystal is a new ferroelectric substance with a high Curie temperature of 430degreesC and the space group C-2 at RT.

引用

页码：L946 / L948

页数：3

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