<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Local geometric and electronic structures and origin of magnetism in Co-doped BaTiO3 multiferroics"^^ . "We have prepared polycrystalline samples BaTi1−xCoxO3 (x = 0–0.1) by solid-state reaction. X-ray diffraction and Raman-scattering studies reveal the phase separation in crystal structure as changing Co-doping content (x). The samples with x = 0–0.01 are single phase in a tetragonal structure. At higher doping contents (x > 0.01), there is the formation and development of a secondary hexagonal phase. Magnetization measurements at room temperature indicate a coexistence of paramagnetic and weak-ferromagnetic behaviors in BaTi1−xCoxO3 samples with x > 0, while pure BaTiO3 is diamagnetic. Both these properties increase with increasing x. Analyses of X-ray absorption spectra recorded from BaTi1−xCoxO3 for the Co and Ti K-edges indicate the presence of Co2+ and Co3+ ions. They locate in the Ti4+ site of the tetragonal and hexagonal BaTiO3 structures. Particularly, there is a shift of oxidation state from Co2+ to Co3+ when Co-doping content increases. We believe that the paramagnetic nature in BaTi1−xCoxO3 samples is due to isolated Co2+ and Co3+ centers. The addition of Co3+ ions enhances the paramagnetic behavior. Meanwhile, the origin of ferromagnetism is due to lattice defects, which is less influenced by the changes caused by the variation in concentration of Co2+ and Co3+ ions.\r\nThe-Long , P. D. Thang2, T. A. 1, T. V. Manh1, Tran Dang Thanh1,3, V. D. Lam3, N. T. Dang4 and S. C. Yu"^^ . "2015" . "117" . . "Journal Applied Physics"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "The Long"^^ . "Phan"^^ . "The Long Phan"^^ . . "D. Lam"^^ . "V"^^ . "D. Lam V"^^ . . "Dang Thanh"^^ . "Tran"^^ . "Dang Thanh Tran"^^ . . "V. Manh"^^ . "T."^^ . "V. Manh T."^^ . . "C. Yu"^^ . "S."^^ . "C. Yu S."^^ . . "A. Ho"^^ . "T."^^ . "A. Ho T."^^ . . "T. Dang"^^ . "N."^^ . "T. Dang N."^^ . . "Duc Thang"^^ . "Pham"^^ . "Duc Thang Pham"^^ . . . . . "HTML Summary of #1796 \n\nLocal geometric and electronic structures and origin of magnetism in Co-doped BaTiO3 multiferroics\n\n" . "text/html" . . . "Engineering Physics" . .