Influence of parasitic phases on the properties of BiFeO3 epitaxial thin films
By H. Béa, Manuel Bibes, A. Barthélémy, K. Bouzehouane, E. Jacquet, A. Khodan, J. Contour, Stephane Fusil, F. Wyczisk, A. Forget and 3 more. 2005
373 citations recorded by the source corpus.
We have explored the influence of deposition pressure and temperature on the growth of BiFeO3 thin films by pulsed laser deposition onto (001)-oriented SrTiO3 substrates. Single-phase BiFeO3 films are obtained in a region close to 10−2mbar and 580°C. In nonoptimal conditions, x-ray diffraction reveals the presence of Fe oxides or of Bi2O3. We address the influence of these parasitic phases on the magnetic and electrical properties of the films and show that films with Fe2O3 systematically exhibit a ferromagnetic behavior, while single-phase films have a low bulklike magnetic moment. Conductive-tip atomic force microscopy mappings also indicate that Bi2O3 conductive outgrowths create shortcuts through the BiFeO3 films, thus preventing their practical use as ferroelectric elements in functional heterostructures.
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/4ce6d3ad658183c27ea5c5c8f4fbc28c6e8e4055
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In Electronic, Optical and Magnetic Materials
- A. Barthélémy
- Manuel Bibes
- G. Lawes
- Girish Srinivasan
- J. Scott
- Ramamoorthy Ramesh
- Hadis Morkoç
- Ya. I. Alivov
In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Introduction to magnetoelectric coupling and multiferroic films (2011, background): “There have been suggestions that the magnetic signal observed in the BiFeO3 thin films may arise from iron oxide impurity phases, whether γ -Fe2O3 [153] or Fe3O4 [154], or mixed valence effects on the Fe site [155].”
- Oxide Spintronics (2007, background): “Its antiferromagnetic [283]–[285], [300] character has been used to induce an exchange bias on a soft ferromag-”