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Title: Role of Pb(Zr 0.52Ti 0.48)O 3 substitution in multiferroic properties of polycrystalline BiFeO 3 thin films
Authors: Yan, F.
Zhu, T.J.
Lai, M.O. 
Lu, L. 
Issue Date: 1-Dec-2011
Citation: Yan, F., Zhu, T.J., Lai, M.O., Lu, L. (2011-12-01). Role of Pb(Zr 0.52Ti 0.48)O 3 substitution in multiferroic properties of polycrystalline BiFeO 3 thin films. Journal of Applied Physics 110 (11) : -. ScholarBank@NUS Repository.
Abstract: Multiferroic materials are of considerable interest due to the intriguing science and application potential. Effects of Pb(Zr 0.52Ti 0.48)O 3 (PZT) modification on the structural, electrical, ferroelectric domain structure and ferromagnetic properties of BiFeO 3 (BFO) polycrystalline films were investigated in detail. A morphotropic phase boundaries between rhombohedral perovskite (R3c) and tetragonal (P4 mm) were found in the PZT modified BFO thin films. 2 and 5 PZT modified BFO films exhibit uniform surface, larger domain size, fewer domain walls density, and lower electrical conductivity comparing with the pure BFO film. The 2 and 5 PZT modified BFO thin films show well saturated P-E hysteresis loops with improved remnant polarization close to 76.8 and 96.7 C/cm 2. The improved ferroelectric and dielectric properties of the PZT modified BFO films are attributed to the modified phase structure and bond lengths of Bi-O, decreased concentration of defects and defect dipole complexes, and different domain structures. The saturated magnetizations under a magnetic field of 5 000 Oe at room temperature are 8.5, 11.4, and 14.3 emu/cm 3 for the pure, 2 and 5 PZT modified BFO films, respectively. The elevated magnetic properties of PZT modified BFO may be due to the distorted spin cycloid, varied canting angle of Fe-O-Fe bond via the Zr/Ti substitution, and suppressed spiral spin structure via Pb ions substitution of Bi ions. © 2011 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.3668123
Appears in Collections:Staff Publications

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