Observation of room-temperature ferroelectricity in tetragonal strontium titanate thin films on SrTiO3 (001) substrates

被引：82

作者：

Kim, Y. S.

Kim, D. J.

Kim, T. H.

Noh, T. W. ^{[1
]}

Choi, J. S.

Park, B. H.

Yoon, J.-G.

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, ReCOE & FPRD, Seoul 151, South Korea

[2] Konkuk Univ, Dept Phys, Seoul 143701, South Korea

[3] Univ Suwon, Dept Phys, Suwon 455743, South Korea

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 04期

关键词：

19;

D O I：

10.1063/1.2764437

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors investigated the ferroelectric properties of strontium titanate (STO) thin films deposited on SrTiO3 (001) substrates with SrRuO3 electrodes. The STO layer was grown coherently on the SrTiO3 substrate without in-plane lattice relaxation, but its out-of-plane lattice constant increased with a decrease in the oxygen pressure during deposition. Using piezoresponse force microscopy and P-V measurements, the authors showed that the tetragonal STO films possess room-temperature ferroelectricity. The authors discuss the possible origins of the observed ferroelectricity. (C) 2007 American Institute of Physics.

引用

页数：3

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