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Ferroelectric and Magnetic Properties of Multiferroic BiFeO3-Based Composite Films.
- Source :
- IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control; May2008, Vol. 55 Issue 5, p1051-1055, 5p, 6 Black and White Photographs, 1 Chart, 6 Graphs
- Publication Year :
- 2008
-
Abstract
- BiFeO<subscript>3</subscript>-based composite films were fabricated onto the Pt/Ti/SiO<subscript>2</subscript>/Si(100) substrates by a chemical solution deposition (CSD) method using the precursor solutions with various excess iron composition followed by annealing at 923 K for 30 minutes under oxygen gas flow. Coexistence of spontaneous magnetization and remanent polarization could be obtained in the BiFeO<subscript>3</subscript>-based composite films with high excess iron composition. The remanent magnetization of almost 20 emu/cm³ and the magnetic coercive field of 1.5 kOe were obtained at the iron composition ratio of Fe/Bi = 1.25. In this specimen, the remanent polarization at 90 K was approximately 10 µC/cm² at the electric field of 1500 kV/cm. Structural analysis suggested that the remanent polarization has a possibility to increase by suppressing the formation of the secondary phases of Bi<subscript>2</subscript>Fe<subscript>4</subscript>O<subscript>9</subscript> and α-Fe<subscript>2</subscript>O<subscript>3</subscript>, these are the nonferroelectric material as well as antiferromagnetic phase. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08853010
- Volume :
- 55
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control
- Publication Type :
- Academic Journal
- Accession number :
- 32157389
- Full Text :
- https://doi.org/10.1109/TUFFC.2008.755