A Pure Bismuth A Site Polar Perovskite Synthesized at Ambient Pressure

Bridges, Craig A.; Allix, Mathieu; Suchomel, Matthew R.; Kuang, Xiaojun; Sterianou, Iasmi; Sinclair, Derek C.; Rosseinsky, Matthew J.

doi:10.1002/anie.200703146

Cited by 38 publications

(34 citation statements)

References 20 publications

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“…Although no indication of perfect loop saturation was observed at the highest applied fields, it clearly demonstrates the switchable polar ferroelectric structure of FeTiTaO 6 . These hysteresis loops are very similar to that reported for BiTi 3/8 Fe 2/8 Mg 3/8 O 3 12 and BiFeO 3 13,14 …”

Section: Resultssupporting

confidence: 88%

“…Hence, it can be safely concluded that Fe ion plays the dominant role to enhance the ferroelectric behavior in FeTiTaO 6 . Fe 3+ ions can adopt a range of low‐symmetry coordination environments owing to the 3 d 5 configuration, in contrast to Al 3+ ions, which disfavor low‐symmetry environments because of the absence of the valence‐shell d orbital 12 . This situation can strengthen the hybridization between the cation and O and thus weaken the short‐range repulsions, thereby allowing the ferroelectric transition.…”

Section: Resultsmentioning

confidence: 99%

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Microstructure and Relaxor Behavior of Dense Fine‐Grain FeTiTaO₆ Ceramics

Shi

Wang

et al. 2010

Journal of the American Ceramic Society

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A new type of FeTiTaO6 ceramics with a high density was synthesized by the solid‐state method. X‐ray diffraction and scanning electron microscopy patterns indicate that the specimens exhibit a rutile structure and the mean particle size was about 200–300 nm. The heterovalent substitutions of Fe3+ and Ta5+ at Ti4+ site drive the incipient ferroelectric to the relaxor behavior, and a strong dispersion of the maximum dielectric permittivity appears around Tm, which shifts towards higher temperatures with the increasing frequency. The variation of Tm with frequency follows the Vogel–Fulcher relationship well, wherein Ea=0.068 eV, Tf=508 K, and f0=109 Hz. These results indicate that the nonperovskite‐type FeTiTaO6 ceramic is a promising candidate for lead‐free relaxor ferroelectrics in practical applications.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Microstructure and Relaxor Behavior of Dense Fine‐Grain FeTiTaO₆ Ceramics

Shi

Wang

et al. 2010

Journal of the American Ceramic Society

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“…We have developed a strategy based on multiple B site cations to access such materials, e.g., antiferroelectric Bi 2 Mn 4/3 Ni 2/3 O 6 [ 7 ] and the polar rhombohedral (R [111] ) phase BiTi 3/8 Fe 2/8 Mg 3/8 O 3 (BTFM), which has a high Curie temperature of 730 °C. [ 8 ] In BTFM, in addition to the long-range ordered [111] p displacements, the Bi cations have locally correlated [110] p displacements [ 9 ] which can be converted into a long-range polarization along this direction by the introduction of LaFeO 3 (LFO) which itself has antiferrodistortive [110] p displacements, although this orthorhombic O [110] The perovskite oxide lead zirconate titanate (PbZr 1− x Ti x O 3 ) (PZT) has extraordinary electromechanical properties at the morphotropic phase boundary (MPB), [ 1 ] making modifi ed PZT ceramics the basis for almost all actuators, sensors and related applications in use today. The MPB in the PZT solid solution occurs near x ≈ 0.48 [ 1 ] between the ferroelectric rhombohedral ( R 3 m , denoted as R [111] ) and tetragonal ( P 4 mm , denoted as T [001] ) phases, with polarizations lying along the [111] p body diagonal and [001] p edge of the primitive ≈ 4 Å ABO 3 perovskite unit cell, respectively.…”

Section: Doi: 101002/adma201405452mentioning

confidence: 99%

Morphotropic Phase Boundary in the Pb‐Free (1 − x)BiTi_3/8Fe_2/8Mg_3/8O₃–xCaTiO₃ System: Tetragonal Polarization and Enhanced Electromechanical Properties

et al. 2015

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(NBT), BaTiO 3 (BTO), and K 0.5 Bi 0.5 TiO 3 (KBT) are known but all have inferior properties to PZT. [ 2,3,5 ] Bi 3+ has a 6s 2 confi guration with crystal chemistry similar to that of Pb 2+ , and bismuthbased perovskites are attractive as they can offer high Curie and depolarization temperatures required for demanding application environments. [ 5,6 ] [ 9 ] which can be converted into a long-range polarization along this direction by the introduction of LaFeO 3 (LFO) which itself has antiferrodistortive [110] p displacements, although this orthorhombic O [110] The perovskite oxide lead zirconate titanate (PbZr 1− x Ti x O 3 ) (PZT) has extraordinary electromechanical properties at the morphotropic phase boundary (MPB), [ 1 ] making modifi ed PZT ceramics the basis for almost all actuators, sensors and related applications in use today. The MPB in the PZT solid solution occurs near x ≈ 0.48 [ 1 ] between the ferroelectric rhombohedral ( R 3 m , denoted as R [111] ) and tetragonal ( P 4 mm , denoted as T [001] ) phases, with polarizations lying along the [111] p body diagonal and [001] p edge of the primitive ≈ 4 Å ABO 3 perovskite unit cell, respectively. [1][2][3] The PZT phases are untilted and the R [111] and T [001] structures are described crystallographically, using a modifi ed Glazer notation, as a a a + , respectively, where the subscript indicates ferroelectric displacement and the superscript the nature of the octahedral tilting with respect to the primitive unit cell axes. [ 4 ] It is challenging to create an MPB in a bismuth-based lead-free system as it has proved diffi cult to prepare phases with polarization directed along the [001] p primitive cell edge in such materials. Several Pb-free MPB systems based on K 0.5 Na 0.5 NbO 3 , Na 0.5 Bi 0.5 TiO 3

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“…[9][10][11][12] BiFeO 3 crystallizes in the space group R3c with a H = 5.579 and c H = 13.869 (in hexagonal setting) at room temperature and ambient pressure. A number of materials have the same structure as that of BiFeO 3 , for example, LiNbO 3,[15] Bi 2 Ti 3/8 Fe 2/8 Mg 3/8 O 6 , [14] and ZnSnO 3 (prepared at 7 GPa). [16] To our knowledge, none of them has long-range magnetic ordering.…”

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confidence: 99%