Improved ferroelectric and leakage properties in symmetric BiFeO3/SrTiO3 superlattice

被引：36

作者：

Bose, Somenath ^{[1
]}

Krupanidhi, S. B. ^{[1
]}

机构：

[1] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 21期

关键词：

D O I：

10.1063/1.2742322

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Symmetric BiFeO3/SrTiO3 superlattices were fabricated by pulsed laser deposition on SrTiO3 (100) substrates. Frequency independent and near saturated P-E hysteresis was observed in the case of a superlattice (periodicity of similar to 11 nm) as compared to leaky hysteresis observed in epitaxial BiFeO3. Room temperature leakage current density of the superlattice was almost two orders of magnitude lower than that of BiFeO3. Observed leakage current behavior in case of both BiFeO3 and superlattice indicates the dominance of space charge limited conduction. Improvement in ferroelectric property was discussed in connection to enhanced epitaxial strain, reduced leakage current, and electrostatic interaction between BiFeO3 and SrTiO3. (c) 2007 American Institute of Physics.

引用

页数：3

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