Spray pyrolysis deposited multiferroic BiFeO3 films | Zendy

P. K. Siwach | Zendy; Jai Singh | Zendy; H. K. Singh | Zendy; G. D. Varma | Zendy; O. N. Srivastava | Zendy

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Spray pyrolysis deposited multiferroic BiFeO3 films

Author(s) -

P. K. Siwach,

Jai Singh,

H. K. Singh,

G. D. Varma,

O. N. Srivastava

Publication year - 2009

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3072823

Subject(s) - ferromagnetism , multiferroics , antiferromagnetism , materials science , annealing (glass) , condensed matter physics , magnetization , crystal structure , spray pyrolysis , thin film , crystallography , nanotechnology , ferroelectricity , chemistry , optoelectronics , metallurgy , physics , magnetic field , quantum mechanics , dielectric

BiFeO3 (BFO) films were prepared by nebulized spray pyrolysis technique on a single crystal LaAlO3 (001) substrate at ∼ 300 °C and annealing in oxygen at ∼ 550 °C for 1 h. In all films BFO is the majority phase having a rhombohedrally distorted structure with R3m symmetry and lattice parameters are a = 3.96 Å and α = 89.7°. Atomic force microscopy reveals smooth and dense surface morphology. Despite the G-type antiferromagnetic spin structure of BFO the present BFO show well-defined M-H loops and unexpected ferromagnetism as evidenced by large saturation magnetization, ∼ 125 emu/cc. The origin of anomalous ferromagnetism in the present films has been traced to the presence of nanometric Fe2O3 embedded in the BFO matrix

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