Work

Optical band gap of BiFeO3 grown by molecular-beam epitaxy

Year: 2008

Type: article

Abstract: Bi Fe O 3 thin films have been deposited on (001) SrTiO3 substrates by adsorption-controlled reactive molecular-beam epitaxy. For a given bismuth overpressure and oxygen activity, single-phase BiFeO3 films can be grown over a range of deposition temperatures in accordance with thermodynamic calculations. Four-circle x-ray diffraction reveals phase-pure, epitaxial films with ω rocking curve full width at half maximum values as narrow as 29arcsec (0.008°). Multiple-angle spectroscopic ellipsometry reveals a direct optical band gap at 2.74eV for stoichiometric as well as 5% bismuth-deficient single-phase BiFeO3 films.

Source: Applied Physics Letters

DOI: 10.1063/1.2901160

Authors: J. F. Ihlefeld, N. J. Podraza, Z. K. Liu, R. C. Rai, X. Xu, T. Heeg, Y. B. Chen, J. Li, R. W. Collins, J. L. Musfeldt, X. Q. Pan, J. Schubert, R. Ramesh, D. G. Schlom

Institutions: Pennsylvania State University, University of California, Berkeley, University of Tennessee at Knoxville, Forschungszentrum Jülich, University of Michigan, University of Toledo

Language: English

Topic: Multiferroics and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1590887373

FWCI: 6.615

Cites: 33

Cited by: 388

Related to: 7