Influence of iron addition on the oxygen-deficient Sr0.85Bi0.15Co1−xFexO3−δ (0.0⩽x⩽1.0) perovskites

Eriksson, Annika K.; Lindberg, Fredrik; Svensson, Gunnar; Svedlindh, Peter; Henry, Paul; Eriksson, Sandra; Knee, Christopher S.

doi:10.1016/j.jssc.2008.04.037

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…The parameter a and the error standard deviation σ are shown in Table . Due to the slight difference between effective ionic radius of high spin Fe 3+ ( R = 0.645 Å) and Co 3+ ( R = 0.61 Å), the crystallographic parameters for sample S8B2F9C1 ( a = 3.905 Å) and S8B2F5C5 (3.895 Å) are very close, consistent with the reported results by Eriksson et al . Therein, the crystallographic parameter a of Sr 1− m Bi m Fe 1− i Co i O 3−γ (SBFC) phase is mainly determined by m .…”

Section: Resultssupporting

confidence: 89%

Structural Evolution and Multiferroics in Sr‐Doped Bi₇Fe_1.5Co_1.5Ti₃O₂₁ Ceramics

Wang

Peng

et al. 2015

J. Am. Ceram. Soc.

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The ceramics with the composition of Sr x Bi 7x Fe 1.5 Co 1.5 Ti 3 O 21d (0 ≤ x ≤ 1, SBFCT) were prepared by a citratenitrate combustion method, and the phase evolution with an increasing Sr content was investigated. Pure Aurivillius phase SBFCT with a layer number of n = 6 was obtained when x ≤ 0.25, and then the structure collapsed to 5 layers for x = 0.50, then alternating 4 and 5 layers for x = 0.75, and finally 4 layers for x = 1.00. Meanwhile, secondary phase Sr 1m Bi m Fe 1i Co i O 3c appeared when x > 0.25, which is antiferromagnetic (AFM) and with low resistivity. Enhanced ferromagnetic and ferroelectric properties were observed from single phase SBFCTs at the room temperature, and the ferromagnetic transition temperature (T c ) increases with the Sr doping level x in the single phase range. The remnant magnetization (2M r ) is 2.27 emu/g and the remnant polarization (2P r ) is 2.89 lC/cm 2 at an applied electric field of 100 kV/cm for the x = 0.25 sample.X. Tan-contributing editor Manuscript No. 35940.

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Section: Resultssupporting

confidence: 89%

Structural Evolution and Multiferroics in Sr‐Doped Bi₇Fe_1.5Co_1.5Ti₃O₂₁ Ceramics

Wang

Peng

et al. 2015

J. Am. Ceram. Soc.

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“…63 For z = 0.85 material, an ordering of oxygen vacancies, similar to that in Sr 8 Fe 8 O 23 , was suggested. 70 Apparently, none of these situations is realized in the locally observed Bi 2 (Sr,Pb)Fe 3 O 8.5 and Bi 3 (Sr,Pb)Fe 4 O 11.5 structures in our samples. Here, the layered ordering of the oxygen vacancies and the interlayer ordering of the A cations are coupled.…”

Section: Discussioncontrasting

confidence: 53%

“…For the z = 2/3 compound, an intralayer ordering of the Sr and Bi cations was also observed . For z = 0.85 material, an ordering of oxygen vacancies, similar to that in Sr 8 Fe 8 O 23 , was suggested . Apparently, none of these situations is realized in the locally observed Bi 2 (Sr,Pb)Fe 3 O 8.5 and Bi 3 (Sr,Pb)Fe 4 O 11.5 structures in our samples.…”

Section: Discussionsupporting

confidence: 51%

Atomic Structure of Defects in Anion-Deficient Perovskite-Based Ferrites with a Crystallographic Shear Structure

et al. 2014

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Crystallographic shear (CS) planes provide a new structure-generation mechanism in the anion-deficient perovskites containing lone-pair cations. Pb2Sr2Bi2Fe6O16, a new n = 6 representative of the A(n)B(n)O(3n-2) homologous series of the perovskite-based ferrites with the CS structure, has been synthesized using the solid-state technique. The structure is built of perovskite blocks with a thickness of four FeO6 octahedra spaced by double columns of FeO5 edge-sharing distorted tetragonal pyramids, forming 1/2[110](101)p CS planes (space group Pnma, a = 5.6690(2) Å, b = 3.9108(1) Å, c = 32.643(1) Å). Pb2Sr2Bi2Fe6O16 features a wealth of microstructural phenomena caused by the flexibility of the CS planes due to the variable ratio and length of the constituting fragments with {101}p and {001}p orientation. This leads to the formation of "waves", "hairpins", "Γ-shaped" defects, and inclusions of the hitherto unknown layered anion-deficient perovskites Bi2(Sr,Pb)Fe3O8.5 and Bi3(Sr,Pb)Fe4O11.5. Using a combination of diffraction, imaging, and spectroscopic transmission electron microscopy techniques this complex microstructure was fully characterized, including direct determination of positions, chemical composition, and coordination number of individual atomic species. The complex defect structure makes these perovskites particularly similar to the CS structures in ReO3-type oxides. The flexibility of the CS planes appears to be a specific feature of the Sr-based system, related to the geometric match between the SrO perovskite layers and the {100}p segments of the CS planes.

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“…Most researches were focused on the improvement of ferroelectric properties through A-site doping by using Sr, La, Nd, Sm, Pb and so on. Several studies had enhanced the magnetic properties of BiFeO 3 through B-site substitution by using Mn, Nb, Cr and Co [2][3][4][5][6]. The ionic radius and outermost electronic distribution of magnetic Mn and Co were similar with Fe.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristics of BiFeO3 Ceramics Doped by MnO2 and Co2O3

et al. 2010

KEM

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BiFeO3-based single-phase multiferroics have been widely studied in both ceramics and films. However, the macroscopic magnetic properties of BiFeO3 ceramics were now most very weak. In this work, MnO2 and Co2O3 were used as B-site substitutes in BiFeO3 ceramics in order to the enhancement of magnetic properties. The change of magnetization was analyzed based on the phase composition and the microstructure of ceramics.

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Influence of iron addition on the oxygen-deficient Sr0.85Bi0.15Co1−xFexO3−δ (0.0⩽x⩽1.0) perovskites

Cited by 8 publications

References 17 publications

Structural Evolution and Multiferroics in Sr‐Doped Bi₇Fe_1.5Co_1.5Ti₃O₂₁ Ceramics

Structural Evolution and Multiferroics in Sr‐Doped Bi₇Fe_1.5Co_1.5Ti₃O₂₁ Ceramics

Atomic Structure of Defects in Anion-Deficient Perovskite-Based Ferrites with a Crystallographic Shear Structure

Preparation and Characteristics of BiFeO<sub>3</sub> Ceramics Doped by MnO<sub>2</sub> and Co<sub>2</sub>O<sub>3</sub>

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Influence of iron addition on the oxygen-deficient Sr0.85Bi0.15Co1−xFexO3−δ (0.0⩽x⩽1.0) perovskites

Cited by 8 publications

References 17 publications

Structural Evolution and Multiferroics in Sr‐Doped Bi7Fe1.5Co1.5Ti3O21 Ceramics

Structural Evolution and Multiferroics in Sr‐Doped Bi7Fe1.5Co1.5Ti3O21 Ceramics

Atomic Structure of Defects in Anion-Deficient Perovskite-Based Ferrites with a Crystallographic Shear Structure

Preparation and Characteristics of BiFeO<sub>3</sub> Ceramics Doped by MnO<sub>2</sub> and Co<sub>2</sub>O<sub>3</sub>

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Structural Evolution and Multiferroics in Sr‐Doped Bi₇Fe_1.5Co_1.5Ti₃O₂₁ Ceramics

Structural Evolution and Multiferroics in Sr‐Doped Bi₇Fe_1.5Co_1.5Ti₃O₂₁ Ceramics