Structural basis of ferroelectricity in the bismuth titanate family

Newnham, R. E.; Wolfe, R.; Dorrian, J.F.

doi:10.1016/0025-5408(71)90082-1

Cited by 635 publications

(317 citation statements)

References 7 publications

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“…Bi 5 Ti 3 FeO 15 (BTFO) is an example of the Aurivillius phase material with of n ¼ 4 (Bi 4 Ti 3 O 12 -BiFeO 3 ) and thus has a four-layered perovskite unit of (Bi 3 Ti 3 FeO 13 ) 2À sandwiched by two (Bi 2 O 2 ) 2þ layers along c-axis. 8 Previous work undertaken on BTFO has shown it to be both ferroelectric, with a Curie temperature of about 730 C, 9 and to possess antiferromagnetic order, with a Neel point of 80 K. 10 The magneto-electric coupling behavior 11 and an obvious magnetocapacitance effect 12 have also been observed. By Nd-doping 13 or by substituting Fe with the Co 14 BTFO, solid-solution films have been reported to exhibit ferromagnetism to some degree, although recent work 15,16 has shown that great care must be taken, when interpreting ferromagnetic responses, to eliminate the effects of ferromagnetic second phases, even at very low levels.…”

mentioning

confidence: 95%

The structural and piezoresponse properties of c-axis-oriented Aurivillius phase Bi5Ti3FeO15 thin films deposited by atomic vapor deposition

Zhang

Deepak

Keeney

et al. 2012

Applied Physics Letters

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The deposition by atomic vapor deposition of highly c-axis-oriented Aurivillius phase Bi 5Ti 3FeO 15 (BTFO) thin films on (100) Si substrates is reported. Partially crystallized BTFO films with c-axis perpendicular to the substrate surface were first deposited at 610°C (8 excess Bi), and subsequently annealed at 820°C to get stoichiometric composition. After annealing, the films were highly c-axis-oriented, showing only (00l) peaks in x-ray diffraction (XRD), up to (0024). Transmission electron microscopy (TEM) confirms the BTFO film has a clear layered structure, and the bismuth oxide layer interleaves the four-block pseudoperovskite layer, indicating the n 4 Aurivillius phase structure. Piezoresponse force microscopy measurements indicate strong in-plane piezoelectric response, consistent with the c-axis layered structure, shown by XRD and TEM

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mentioning

confidence: 95%

The structural and piezoresponse properties of c-axis-oriented Aurivillius phase Bi5Ti3FeO15 thin films deposited by atomic vapor deposition

Zhang

Deepak

Keeney

et al. 2012

Applied Physics Letters

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“…Of these, perovskites are by far the most widely studied, due in part to their simple prototype structure, the wide range of compounds that can be formed and their existing markets for applications. Ferroelectricity also exists in other oxide groups, such as tungsten bronzes [1], pyrochlores [2,3] and bismuth-layered structures including Aurivillius phases [4]. These structures are all based on corner-sharing octahedra that are able to undergo distortions that can lead to the development of a switchable polarisation.…”

Section: Introductionmentioning

confidence: 99%

Structural phase transitions in the Ag2Nb4O11–Na2Nb4O11 solid solution

Woodward¹,

Lees²,

Thomas³

2012

Journal of Solid State Chemistry

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The phase transitions between various structural modifications of the natrotantite-structured system xAg 2 Nb 4 O 11 -(1-x)Na 2 Nb 4 O 11 have been investigated and a phase diagram constructed as a function of temperature and composition. This shows three separate phase transition types: (1) paraelectricferroelectric, (2) rhombohedral -monoclinic and (3) a phase transition within the ferroelectric rhombohedral zone between space groups R3c and R3. The parent structure for the entire series has space group R 3 c. Compositions with x > 0.75 are rhombohedral at all temperatures whereas compositions with x < 0.75 are all monoclinic at room temperature and below. At x = 0.75, rhombohedral and monoclinic phases coexist with the phase boundary below room temperature being virtually temperature-independent. The ferroelectric phase boundary extends into the monoclinic phase field. No evidence was found for the R3-R3c phase boundary extending into the monoclinic phase field and it is concluded that a triple point is formed.

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“…9,10 Compared with traditional piezoelectric ceramics, such as lead zirconate titanate and BaTiO 3 , BLSFs compounds are characterized by low piezoelectric activity and electromechanical coupling factors and high coercive field because the rotation of the spontaneous polarization is restricted to the a-b plane. 11 It has been reported that BLSFs solid solution ceramics exhibit improved electrical properties compared to end-member compounds.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and electrical properties of Aurivillius phase (CaBi2Nb2O9)1−x(BaBi2Nb2O9)x solid solution

Zhang

Yan

Reece

2010

Journal of Applied Physics

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Articles you may be interested inThe microstructures and electrical properties of Aurivillius phase ferroelectric solid solutions of ͑CaBi 2 Nb 2 O 9 ͒ 1−x ͑BaBi 2 Nb 2 O 9 ͒ x ͑0 Յ x Յ 1͒ have been studied. X-ray diffraction analyses revealed a bismuth layered structure for all compositions. Scanning electron microscope images showed randomly oriented and platelike grain morphology. The Curie point T c or the maximum permittivity temperature T m decreased with increasing x. The ͑CaBi 2 Nb 2 O 9 ͒ 1−x ͑BaBi 2 Nb 2 O 9 ͒ x ceramics exhibited a ferroelectric-paraelectric phase transition at small x values ͑x Յ 0.5͒, whereas a relaxor behavior was observed at high x values ͑x Ն 0.8͒. The d 33 value of CaBi 2 Nb 2 O 9 ceramics was enhanced by Ba 2+ doping on the A-sites ͑x Յ 0.3͒. A combination of high d 33 values and high T c points ͑Ͼ700°C͒ suggests that compositions with x Յ 0.3 could be good candidates for high-temperature piezoelectric applications. The composition with x = 0.8 is a relaxor ferroelectric with T m around 320°C at 1 MHz.

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Structural basis of ferroelectricity in the bismuth titanate family

Cited by 635 publications

References 7 publications

The structural and piezoresponse properties of c-axis-oriented Aurivillius phase Bi5Ti3FeO15 thin films deposited by atomic vapor deposition

The structural and piezoresponse properties of c-axis-oriented Aurivillius phase Bi5Ti3FeO15 thin films deposited by atomic vapor deposition

Structural phase transitions in the Ag2Nb4O11–Na2Nb4O11 solid solution

Microstructure and electrical properties of Aurivillius phase (CaBi2Nb2O9)1−x(BaBi2Nb2O9)x solid solution

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