Ferroelectric and magnetic properties of multiferroic BiFeO(3)-based composite films.
IEEE Trans Ultrason Ferroelectr Freq Control
; 55(5): 1051-5, 2008 May.
Article
en En
| MEDLINE
| ID: mdl-18519211
ABSTRACT
BiFeO(3)-based composite films were fabricated onto the Pt/Ti/SiO(2)/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(3)-based composite films with high excess iron composition. The remanent magnetization of almost 20 emu/cm(3) 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 microC/cm(2) 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(2)Fe(4)O(9) and alpha-Fe(2)O(3), these are the nonferroelectric material as well as antiferromagnetic phase.
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1
Banco de datos:
MEDLINE
Asunto principal:
Bismuto
/
Compuestos Férricos
/
Cristalización
/
Membranas Artificiales
Idioma:
En
Revista:
IEEE Trans Ultrason Ferroelectr Freq Control
Asunto de la revista:
MEDICINA NUCLEAR
Año:
2008
Tipo del documento:
Article
País de afiliación:
Japón