STRUCTURAL CHARACTERIZATION OF Bi6Ti3Fe2O18 OBTAINED BY MOLTEN SALT SYNTHESIS

García-Guaderrama, M.; Fuentes-Montero, Luis; Rodríguez, A.; Fuentes, L.

doi:10.1080/10584580600949063

Cited by 24 publications

(25 citation statements)

References 14 publications

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“…[5,13,22]. The higher symmetric condition in Ti(1)O 6 give an indication that the Mn ions could mainly distributed at this site. We could explain as follows: the filled or partially filled d-orbitals of transition metal ions could easily hybridize with the O 2p orbitals [28] and this hybridization could lead to high symmetrical octahedra or similar bond length between Mn ion with oxygen ions at the opposite direction.…”

Section: Resultsmentioning

confidence: 96%

“…There are two types of octahedra, i.e. Ti(1)O 6 and Ti(2)O 6 and both exhibit significant distortion (tilting). The octahedral tilting in perovskites has been described by Glazer [26] and others [21,22,27].…”

Section: Resultsmentioning

confidence: 99%

“…The introduction of magnetic transition metal cations (d n ) into the perovskite layers in the Aurivillius phases has received much interest since this may result in a material which has both dielectric and magnetic properties. Several Aurivillius phases containing both of d 0 and d n cations, such as Bi 5 Ti 3 FeO 15 and Bi 6 Ti 3 Fe 2 O 18 have been synthesized, studied and reported [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Aurivillius phases of PbBi4Ti4O15 doped with Mn3+ synthesized by molten salt technique: Structure, dielectric, and magnetic properties

Zulhadjri

Prijamboedi

Nugroho

et al. 2011

Journal of Solid State Chemistry

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a b s t r a c tDoping of manganese (Mn 3 þ /Mn 4 þ ) into the Aurivillius phase Pb 1 À x Bi 4 þ x Ti 4 À x Mn x O 15 was carried out using the molten salt technique for various Mn concentrations (x ¼0, 0.2, 0.4, 0.6, 0.8, and 1). Single phase samples could be obtained in the composition range with x up to 0.6 as confirmed by X-ray and neutron diffraction analysis. Dielectric measurements show a peak at 801, 803, 813 and 850 K for samples with x ¼0, 0.2, 0.4, and 0.6, respectively, related to the ferroelectric transition temperature (T c ). The main contribution of the in-plane polarization for x r0.2 which was calculated from the atomic positions obtained by the structure analysis is the dipole moment in the Ti(1)O 6 layer; however, for x Z 0.4 the polarization originates from the dipole moment in the Ti(2)O 6 layer. Mn doping in the Pb 1 À x Bi 4 þ x Ti 4 À x Mn x O 15 does not show any long range magnetic ordering.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Aurivillius phases of PbBi4Ti4O15 doped with Mn3+ synthesized by molten salt technique: Structure, dielectric, and magnetic properties

Zulhadjri

Prijamboedi

Nugroho

et al. 2011

Journal of Solid State Chemistry

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“…There are five PK layers per half-unit cell ( m = 5) in this structure, giving three symmetrically-distinct B -site locations over which the magnetic cations (Mn and Fe) can be distributed 20 (Fig. 1(a)) 21 .…”

Section: Introductionmentioning

confidence: 99%

Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material

Keeney

Downing

Schmidt

et al. 2017

Sci Rep

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The five-layer Aurivillius phase Bi6TixFeyMnzO18 system is a rare example of a single-phase room temperature multiferroic material. To optimise its properties and exploit it for future memory storage applications, it is necessary to understand the origin of the room temperature magnetisation. In this work we use high resolution scanning transmission electron microscopy, EDX and EELS to discover how closely-packed Ti/Mn/Fe cations of similar atomic number are arranged, both within the perfect structure and within defect regions. Direct evidence for partitioning of the magnetic cations (Mn and Fe) to the central three of the five perovskite (PK) layers is presented, which reveals a marked preference for Mn to partition to the central layer. We infer this is most probably due to elastic strain energy considerations. The observed increase (>8%) in magnetic cation content at the central PK layers engenders up to a 90% increase in potential ferromagnetic spin alignments in the central layer and this could be significant in terms of creating pathways to the long-range room temperature magnetic order observed in this distinct and intriguing material system.

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“…EX-AFS analysis of Bi 6 Ti 3 Fe 2 O 18 Aurivillius ceramic was performed to elucidate the local environment of Fe cations in this interesting multiferroic material. Sample was obtained by molten salts synthesis, according to the description given by García-Guaderrama et al [11]. The structure obtained by synchrotron radiation diffraction and reported in the cited reference is shown in Fig.…”

Section: Extended X-ray Absorption Fine Structurementioning

confidence: 99%

Synchrotron Techniques Applied to Ferroelectrics: Some Representative Cases

Fuentes-Montero

Montero-Cabrera

Calzada

et al. 2008

Integrated Ferroelectrics

Self Cite

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A panoramic view of synchrotron radiation techniques applied to ferroelectric materials is given. Powder diffraction is applied to analyze the cubic-symmetry break-down in PbFe 0.5 Nb 0.5 O 3 . Slight peaks' splitting reveals the considered phase to be rhombohedral. Grazing incidence scattering is used in a comparative study of PbTiO 3 nano-dots on SrTiO 3 substrate and a Pt layer. Phase identification, texture assessment and crystallite size characterization are performed. The Anaelu software for two-dimensional diffraction analysis is presented. Local ordering in multiferroic Bi 6 Ti 3 Fe 2 O 18 is determined by means of extended x-ray absorption fine structure. The iron cations' tendency to occupy the centered perovskite layer of the unit cell is established.

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STRUCTURAL CHARACTERIZATION OF Bi₆Ti₃Fe₂O₁₈ OBTAINED BY MOLTEN SALT SYNTHESIS

Cited by 24 publications

References 14 publications

Aurivillius phases of PbBi4Ti4O15 doped with Mn3+ synthesized by molten salt technique: Structure, dielectric, and magnetic properties

Aurivillius phases of PbBi4Ti4O15 doped with Mn3+ synthesized by molten salt technique: Structure, dielectric, and magnetic properties

Direct atomic scale determination of magnetic ion partition in a room temperature multiferroic material

Synchrotron Techniques Applied to Ferroelectrics: Some Representative Cases

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