DOI: 10.1002/adfm.200700055. The Effects of Multiphase Formation on Strain Relaxation and Magnetization in Multiferroic BiFeO<sub>3</sub> Thin Films

The Effects of Multiphase Formation on Strain Relaxation and Magnetization in Multiferroic BiFeO3 Thin Films

10.1002/adfm.200700055

Crossref journal-article

Wiley

Advanced Functional Materials (311)

Abstract

AbstractMultiferroic epitaxial Bi‐Fe‐O thin films of different thicknesses (15–500 nm) were grown on SrTiO3 (001) substrates by pulsed laser deposition under various oxygen partial pressures to investigate the microstructural evolution in the Bi‐Fe‐O system and its effect on misfit strain relaxation and on the magnetic properties of the films. Films grown at low oxygen partial pressure show the canted antiferromagnetic phase α‐Fe2O3 embedded in a matrix of BiFeO3. The ferromagnetic phase, γ‐Fe2O3 is found to precipitate inside the α‐Fe2O3 grains. The formation of these phases changes the magnetic properties of the films and the misfit strain relaxation mechanism. The multiphase films exhibit both highly strained and fully relaxed BiFeO3 regions in the same film. The magnetization in the multiphase Bi‐Fe‐O films is controlled by the presence of the γ‐Fe2O3 phase rather than heteroepitaxial strain as it is the case in pure single phase BiFeO3. Also, our results show that this unique accommodation of misfit strain by the formation of α‐Fe2O3 gives rise to significant enhancement of the piezo electric properties of BiFeO3.

Bibliography

Lim, S. H., Murakami, M., Sarney, W. L., Ren, S. Q., Varatharajan, A., Nagarajan, V., Fujino, S., Wuttig, M., Takeuchi, I., & SalamancaâRiba, L. G. (2007). The Effects of Multiphase Formation on Strain Relaxation and Magnetization in Multiferroic BiFeO3 Thin Films. Advanced Functional Materials, 17(14), 2594â2599. Portico.

Authors 10

S. H. Lim (first)
M. Murakami (additional)
W. L. Sarney (additional)
S. Q. Ren (additional)
A. Varatharajan (additional)
V. Nagarajan (additional)
S. Fujino (additional)
M. Wuttig (additional)
I. Takeuchi (additional)
L. G. Salamanca‐Riba (additional)

References 28 Referenced 47

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Dates

Type	When
Created	18 years ago (Aug. 17, 2007, 4:46 a.m.)
Deposited	1 year, 11 months ago (Sept. 12, 2023, 12:11 a.m.)
Indexed	6 minutes ago (Aug. 31, 2025, 3:13 p.m.)
Issued	18 years ago (Aug. 17, 2007)
Published	18 years ago (Aug. 17, 2007)
Published Online	18 years ago (Aug. 17, 2007)
Published Print	17 years, 11 months ago (Sept. 24, 2007)

Funders 7

NSF MRSEC
Awards1
1. DMR-00-0520471
ONR
Awards2
1. N000140410085
2. N000140110761
NSF DMR
Awards2
1. 0094265
2. 0231291
NSF
Awards1
1. 0095166
W. M. Keck Foundation
Provincia Autonoma di Trento, Italy
Microcombi project

BibTeX

@article{Lim_2007, title={The Effects of Multiphase Formation on Strain Relaxation and Magnetization in Multiferroic BiFeO3 Thin Films}, volume={17}, ISSN={1616-3028}, url={http://dx.doi.org/10.1002/adfm.200700055}, DOI={10.1002/adfm.200700055}, number={14}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Lim, S. H. and Murakami, M. and Sarney, W. L. and Ren, S. Q. and Varatharajan, A. and Nagarajan, V. and Fujino, S. and Wuttig, M. and Takeuchi, I. and Salamanca‐Riba, L. G.}, year={2007}, month=aug, pages={2594–2599} }

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