TY - JOUR
T1 - Lattice distortion and room-temperature ferroelectric properties of (Sm, Cr) co-doped BiFeO3 thin films
AU - Liu, Wenlong
AU - Tan, Guoqiang
AU - Dong, Guohua
AU - Ren, Huijun
PY - 2013/11
Y1 - 2013/11
N2 - Pure BiFeO3 (BFO) and Bi0.85Sm0.15Fe 0.97Cr0.03O3 (BSFCO) thin films were prepared on FTO/glass (SnO2: F) substrates by using a chemical solution deposition method. The effects of (Sm, Cr) co-doping on the microstructure and ferroelectric properties of the BSFCO thin films were studied. The X-ray diffraction and Raman scattering spectra proved that the co-doped BSFCO thin film has a lattice distortion compared with the pure BFO thin film. The remnant polarization (2P r) of the BSFCO thin film was 153.67 μC/cm 2 at 1 kHz in the applied electric field of 1,270 kV/cm. At an applied electric field of 100 kV/cm, the leakage current density of the co-doped BSFCO thin film (2.12 × 10-6 A/cm2) was 3 orders lower than that of the pure BFO thin film (3.8 × 10-3 A/cm 2). The improved properties of the co-doped thin film could be attributed to lattices distortion, more grain boundaries, higher binding energy of Sm-O and the mixed-valence states of Cr3+ and Cr 6+.
AB - Pure BiFeO3 (BFO) and Bi0.85Sm0.15Fe 0.97Cr0.03O3 (BSFCO) thin films were prepared on FTO/glass (SnO2: F) substrates by using a chemical solution deposition method. The effects of (Sm, Cr) co-doping on the microstructure and ferroelectric properties of the BSFCO thin films were studied. The X-ray diffraction and Raman scattering spectra proved that the co-doped BSFCO thin film has a lattice distortion compared with the pure BFO thin film. The remnant polarization (2P r) of the BSFCO thin film was 153.67 μC/cm 2 at 1 kHz in the applied electric field of 1,270 kV/cm. At an applied electric field of 100 kV/cm, the leakage current density of the co-doped BSFCO thin film (2.12 × 10-6 A/cm2) was 3 orders lower than that of the pure BFO thin film (3.8 × 10-3 A/cm 2). The improved properties of the co-doped thin film could be attributed to lattices distortion, more grain boundaries, higher binding energy of Sm-O and the mixed-valence states of Cr3+ and Cr 6+.
UR - https://www.scopus.com/pages/publications/84887065292
U2 - 10.1007/s10854-013-1400-2
DO - 10.1007/s10854-013-1400-2
M3 - 文章
AN - SCOPUS:84887065292
SN - 0957-4522
VL - 24
SP - 4296
EP - 4301
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 11
ER -