Characterization of electronic structure and defect states of thin epitaxial BiFeO3 films by UV-visible absorption and cathodoluminescence spectroscopies

被引：193

作者：

Hauser, A. J. ^{[1
]}

Zhang, J. ^{[1
,2
,3
]}

Mier, L. ^{[2
]}

Ricciardo, R. A. ^{[2
]}

Woodward, P. M. ^{[2
]}

Gustafson, T. L. ^{[2
]}

Brillson, L. J. ^{[1
,3
]}

Yang, F. Y. ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

[3] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 22期

关键词：

D O I：

10.1063/1.2939101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

UV-visible absorption and cathodoluminescence spectra of phase-pure epitaxial BiFeO(3) thin films grown on SrTiO(3)(001) substrates by ultrahigh vacuum sputtering reveal a bandgap of 2.69-2.73 eV for highly strained similar to 70 nm thick BiFeO(3) films. This bandgap value agrees with theoretical calculations and recent experimental results of epitaxial BiFeO(3) films, demonstrating only minimal bandgap change with lattice distortion. Both absorption and cathodoluminescence spectra show defect transitions at 2.20 and 2.45 eV, of which the latter can be attributed to defect states due to oxygen vacancies. (c) 2008 American Institute of Physics.

引用

页数：3

共 19 条

[1] Photoconductivity in BiFeO3 thin films [J].

Basu, S. R. ;

Martin, L. W. ;

Chu, Y. H. ;

Gajek, M. ;

Ramesh, R. ;

Rai, R. C. ;

Xu, X. ;

Musfeldt, J. L. .

APPLIED PHYSICS LETTERS, 2008, 92 (09)

[2] Influence of parasitic phases on the properties of BiFeO3 epitaxial thin films -: art. no. 072508 [J].

Béa, H ;

Bibes, M ;

Barthélémy, A ;

Bouzehouane, K ;

Jacquet, E ;

Khodan, A ;

Contour, JP ;

Fusil, S ;

Wyczisk, F ;

Forget, A ;

Lebeugle, D ;

Colson, D ;

Viret, M .

APPLIED PHYSICS LETTERS, 2005, 87 (07)

[3] Investigation on the origin of the magnetic moment of BiFeO3 thin films by advanced X-ray characterizations [J].

Bea, Helene ;

Bibes, Manuel ;

Fusil, Stephane ;

Bouzehouane, Karim ;

Jacquet, Eric ;

Rode, Karsten ;

Bencok, Peter ;

Barthelemy, Agnes .

PHYSICAL REVIEW B, 2006, 74 (02)

[4] Band gap and Schottky barrier heights of multiferroic BiFeO3 [J].

Clark, S. J. ;

Robertson, J. .

APPLIED PHYSICS LETTERS, 2007, 90 (13)

[5] Synthesis and ferroelectric properties of epitaxial BiFeO3 thin films grown by sputtering [J].

Das, R. R. ;

Kim, D. M. ;

Baek, S. H. ;

Eom, C. B. ;

Zavaliche, F. ;

Yang, S. Y. ;

Ramesh, R. ;

Chen, Y. B. ;

Pan, X. Q. ;

Ke, X. ;

Rzchowski, M. S. ;

Streiffer, S. K. .

APPLIED PHYSICS LETTERS, 2006, 88 (24)

[6] Preparation and photoabsorption characterization of BiFeO3 nanowires [J].

Gao, F. ;

Yuan, Y. ;

Wang, K. F. ;

Chen, X. Y. ;

Chen, F. ;

Liu, J. -M. .

APPLIED PHYSICS LETTERS, 2006, 89 (10)

[7] Optical band gap of BiFeO3 grown by molecular-beam epitaxy [J].

Ihlefeld, J. F. ;

Podraza, N. J. ;

Liu, Z. K. ;

Rai, R. C. ;

Xu, X. ;

Heeg, T. ;

Chen, Y. B. ;

Li, J. ;

Collins, R. W. ;

Musfeldt, J. L. ;

Pan, X. Q. ;

Schubert, J. ;

Ramesh, R. ;

Schlom, D. G. .

APPLIED PHYSICS LETTERS, 2008, 92 (14)

[8] Magnetic, electric, and optical functionalities of (PLZT)x(BiFeO3)1-x ferroelectric-ferromagnetic thin films [J].

Kanai, T ;

Ohkoshi, S ;

Hashimoto, K .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2003, 64 (03) :391-397

[9] STRUCTURE OF A FERROELECTRIC AND FERROELASTIC MONODOMAIN CRYSTAL OF THE PEROVSKITE BIFEO3 [J].

KUBEL, F ;

SCHMID, H .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1990, 46 :698-702

[10] Linear and nonlinear optical properties of BiFeO3 [J].

Kumar, Amit ;

Rai, Ram C. ;

Podraza, Nikolas J. ;

Denev, Sava ;

Ramirez, Mariola ;

Chu, Ying-Hao ;

Martin, Lane W. ;

Ihlefeld, Jon ;

Heeg, T. ;

Schubert, J. ;

Schlom, Darrell G. ;

Orenstein, J. ;

Ramesh, R. ;

Collins, Robert W. ;

Musfeldt, Janice L. ;

Gopalan, Venkatraman .

APPLIED PHYSICS LETTERS, 2008, 92 (12)

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