TY - JOUR
T1 - Ferroelectric and magnetic properties of multiferroic BiFeO 3-based composite films
AU - Naganuma, Hiroshi
AU - Okubo, Tomosato
AU - Kamishima, Kenji
AU - Kakizaki, Koichi
AU - Hiratsuka, Nobuyuki
AU - Okamura, Soichiro
N1 - Funding Information:
Manuscript received May 26, 2007; accepted October 15, 2007. This study was partly supported by the Grant-in-Aid for Young Scientist (Start up program, Grant No. 18860070) from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by the Sasakawa Scientific Research Grant from The Japan Society (Grant No. 19-216).
PY - 2008/5
Y1 - 2008/5
N2 - BiFeO3-based composite films were fabricated onto the Pt/Ti/SiO2/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 BiFeO3-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 Bi2Fe 4O9 and α-Fe2O3, these are the nonferroelectric material as well as antiferromagnetic phase.
AB - BiFeO3-based composite films were fabricated onto the Pt/Ti/SiO2/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 BiFeO3-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 Bi2Fe 4O9 and α-Fe2O3, these are the nonferroelectric material as well as antiferromagnetic phase.
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U2 - 10.1109/TUFFC.2008.755
DO - 10.1109/TUFFC.2008.755
M3 - Article
C2 - 18519211
AN - SCOPUS:44249087860
SN - 0885-3010
VL - 55
SP - 1051
EP - 1055
JO - Transactions of the IRE Professional Group on Ultrasonic Engineering
JF - Transactions of the IRE Professional Group on Ultrasonic Engineering
IS - 5
M1 - 4524983
ER -