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• W3002659624 endingPage "153944" @default.
• W3002659624 startingPage "153944" @default.
• W3002659624 abstract "We report the dependence of magnetic and electric properties with the substitution of Bi3+ by Ca2+ into the crystal structure of multiferroic calcium doped BiFeO3 for obtaining Bi1-xCaxFeO3, 0 ≤ x ≤ 0.10 Stoichiometric mixtures of Bi2O3, Fe2O3 and CaO were mixed and milled for 5 h using a ball to powder weight ratio of 10:1 by high-energy ball milling. The obtained powder was pressed at 900 MPa to obtain cylindrical pellets and sintered at 800 °C for 2 h. X-ray diffraction and Rietveld refinement were used to evaluate the effect of Ca2+ on the crystal structure and to determinate the phase transition from rhombohedral α-BiFeO3 (R3c) to orthorhombic β-BiFeO3 (Pbnm). In addition, vibrating sample magnetometry (VSM) was used to have knowledge of magnetic order: antiferromagnetism and ferromagnetism were identified for α-BiFeO3 and β-BiFeO3, respectively. Dielectric tests determinate Debye-type relaxation for samples with the rhombohedral crystal structure and no Debye type relaxations for orthorhombic samples. Differences in AC conductivity of rhombohedral samples show different mechanism compared with the conductivity of orthorhombic samples. Ferromagnetic and electrical properties of synthesized materials show a strong correlation with the lattice distortions induced by the ionic ratio between Ca2+ and Bi3+. The effect of Ca2+ over leakage current has an interesting response, an increase of Ca2+ reduce one magnitude order the leakage current for α-BiFeO3 samples; though for β-BiFeO3 samples increase of Ca2+ raise the leakage current in one magnitude order." @default.
• W3002659624 created "2020-01-30" @default.
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• W3002659624 date "2020-05-01" @default.
• W3002659624 modified "2023-09-23" @default.
• W3002659624 title "Enhanced ferromagnetic and electric properties of multiferroic BiFeO3 by doping with Ca" @default.
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• W3002659624 doi "https://doi.org/10.1016/j.jallcom.2020.153944" @default.
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