TY - JOUR
T1 - Effects of La-doping on structural, electrical and multiferroic properties of Bi6Fe2Ti3O18 thin films
AU - Raghavan, Chinnambedu Murugesan
AU - Kim, Jin Won
AU - Choi, Ji Ya
AU - Kim, Sang Su
AU - Kim, Jong Woo
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Bi6Fe2Ti3O18 (BFTO) and La-doped Bi6−xLaxFe2Ti3O18 (BLFT) (x = 0.03; BLFT3, x = 0.06; BLFT6 and 0.09; BLFT9) thin films were prepared on Pt(111)/Ti/SiO2/Si(100) substrates by using a chemical solution deposition method. All thin films were crystallized in a polycrystalline orthorhombic structures confirmed by X-ray diffraction and Raman spectroscopy. A low order of leakage current density 2.05 × 10−4 A/cm2 and improved ferroelectric properties, such as large remnant polarization (2Pr) of 19.5 μC/cm2 with low coercive filed of 300 kV/cm at an applied electric field of 410 kV/cm, were observed for the BLFT6 thin film. The improved properties for the BLFT thin films were correlated to the reduction of oxygen vacancies, the structural distortion and the stabilization of perovskite structures by the La-ion doping into the Bi-site of the BFTO. At room temperature, the BLFT6 and the BLFT9 thin films showed ferromagnetism, while the BFTO and the BLFT3 thin films showed anti-ferromagnetism.
AB - Bi6Fe2Ti3O18 (BFTO) and La-doped Bi6−xLaxFe2Ti3O18 (BLFT) (x = 0.03; BLFT3, x = 0.06; BLFT6 and 0.09; BLFT9) thin films were prepared on Pt(111)/Ti/SiO2/Si(100) substrates by using a chemical solution deposition method. All thin films were crystallized in a polycrystalline orthorhombic structures confirmed by X-ray diffraction and Raman spectroscopy. A low order of leakage current density 2.05 × 10−4 A/cm2 and improved ferroelectric properties, such as large remnant polarization (2Pr) of 19.5 μC/cm2 with low coercive filed of 300 kV/cm at an applied electric field of 410 kV/cm, were observed for the BLFT6 thin film. The improved properties for the BLFT thin films were correlated to the reduction of oxygen vacancies, the structural distortion and the stabilization of perovskite structures by the La-ion doping into the Bi-site of the BFTO. At room temperature, the BLFT6 and the BLFT9 thin films showed ferromagnetism, while the BFTO and the BLFT3 thin films showed anti-ferromagnetism.
KW - BiFeTiO
KW - Chemical solution deposition
KW - Electrical properties
KW - Multiferroic properties
UR - http://www.scopus.com/inward/record.url?scp=84920808779&partnerID=8YFLogxK
UR - https://link.springer.com/article/10.1007%2Fs10971-014-3497-z
U2 - 10.1007/s10971-014-3497-z
DO - 10.1007/s10971-014-3497-z
M3 - Article
AN - SCOPUS:84920808779
SN - 0928-0707
VL - 73
SP - 83
EP - 90
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 1
ER -