Compositional tuning of the strain-induced structural phase transition and of ferromagnetism in Bi1-xBaxFeO3-δ

被引：17

作者：

Bennett, Charlee J. C. ^{[1
]}

Kim, Hyun Sik ^{[1
,3
]}

Varela, Maria ^{[1
]}

Biegalski, Michael D. ^{[2
]}

Kim, Dae Ho ^{[1
,4
]}

Norton, David P. ^{[5
]}

Meyer, Harry M., III ^{[1
]}

Christen, Hans M. ^{[1
,2
]}

机构：

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[4] Tulane Univ, Dept Phys, New Orleans, LA 70118 USA

[5] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

JOURNAL OF MATERIALS RESEARCH | 2011年 / 26卷 / 10期

基金：

美国国家科学基金会;

关键词：

THIN-FILMS; BIFEO3; BAFEO3-X;

D O I：

10.1557/jmr.2011.59

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recent studies by a number of research groups have shown that the structure of epitaxial BiFeO3 (BFO) films changes drastically as a function of substrate-induced biaxial compression, with the crystal structure changing from one being nearly rhombohedral (R-like) to one being nearly tetragonal (T-like), where the "T-like" structure is characterized by a highly enhanced c/a ratio of out-of-plane c to in-plane a lattice parameters. In this work, we show that the critical compressive strain sigma(c) necessary to induce this transition can be reduced significantly by substituting 10% Ba for Bi [Bi0.9Ba0.1FeO3-delta (BBFO)] and that the "T-like" phase in both BBFO and BFO is stable up to the decomposition temperatures of the films in air. Furthermore, our results show that the BBFO solid solution shows clear ferromagnetic properties in contrast to its undoped BFO counterpart.

引用

页码：1326 / 1331

页数：6

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