Rhombohedral–Tetragonal Phase Boundary with High Curie Temperature in (1-x)BiCoO<sub>3</sub>–xBiFeO<sub>3</sub> Solid Solution

Azuma, Masaki; Niitaka, Seiji; Hayashi, Naoaki; Oka, Kengo; Takano, Mikio; Funakubo, Hiroshi; Shimakawa, Yuichi

doi:10.1143/jjap.47.7579

Cited by 96 publications

(103 citation statements)

References 19 publications

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“…5 and 6 clearly indicate a crystal symmetry change with film thickness, regardless the type of the substrate, and suggest that change in the x values for the crystal symmetry boundaries between the tetragonal and rhombohedral symmetries is the same as that reported for BiFeO 3 and the Pb͑Zr, Ti͒O 3 films. 13,14 Based on the phase diagram for the BiCoO 3 -BiFeO 3 solid-solution system reported by Azuma et al, 15 a film with a cubic symmetry was deposited at 700°C for a 0.16BiCoO 3 -0.84BiFeO 3 film because the Curie temperature ͑T c ͒ is below 700°C and likely transforms to the tetragonal one at T c during the cooling process after deposition. In addition, this transformation was accompanied by an additional phase transition from tetragonal to rhombohedral symmetry prior to reaching room temperature.…”

Section: B Thickness Dependence Of Crystal Structurementioning

confidence: 99%

Composition control and thickness dependence of {100}-oriented epitaxial BiCoO3–BiFeO3 films grown by metalorganic chemical vapor deposition

Yasui

Nakajima

Naganuma

et al. 2009

Journal of Applied Physics

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Articles you may be interested inHigh symmetric SrRuO3 (001) thin films: Perfectly lattice-matched electrodes for multiferroic BiFeO3 J. Appl. Phys. 113, 17D913 (2013); 10.1063/1.4795864Multiferroic and structural properties of BiFeO3 close to the strain induced phase transition on different substrates Fabrication of ferroelectric SrBi 2 Ta 2 O 9 capacitor films using plasma-assisted metalorganic chemical vapor deposition and their electrical properties xBiCoO 3 -͑1−x͒BiFeO 3 films were deposited by metalorganic chemical vapor deposition. Although the film composition changed with deposition temperature, the composition could be adjusted by varying the input source gas composition at 700°C. Moreover, adjusting the deposition time could change 0.16BiCoO 3 -0.84BiFeO 3 film thickness. The crystal symmetry changed from rhombohedral to tetragonal as the film thickness decreased for 0.16BiCoO 3 -0.84BiFeO 3 films grown on both ͑100͒SrTiO 3 and ͑100͒ c SrRuO 3 ʈ ͑100͒SrTiO 3 substrates, implying that the x value of the crystal symmetry boundaries between the tetragonal and rhombohedral structures changes with film thickness.

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Section: B Thickness Dependence Of Crystal Structurementioning

confidence: 99%

Composition control and thickness dependence of {100}-oriented epitaxial BiCoO3–BiFeO3 films grown by metalorganic chemical vapor deposition

Yasui

Nakajima

Naganuma

et al. 2009

Journal of Applied Physics

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“…However, this technique is not easily available and few HP perovskite systems based on BiFeO 3 have been reported so far. The entire series of solid solutions has been obtained for the BiFeO 3 -BiMO 3 (M = Mn, Co, and Ga) systems only [20][21][22][23]; in other cases, compositions with the particular ratio Fe 3+ /B 3+ = 1 : 1, where B 3+ = Cr and Mn, were merely studied [24,25].…”

Section: Introductionmentioning

confidence: 99%

Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

et al. 2014

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A metastable perovskite BiFe 0.5 Sc 0.5 O 3 synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions was obtained in two different polymorphs, antipolar P nma and polar I ma2, through an irreversible behavior under a heating/cooling thermal cycling. The I ma2 phase represents an original type of a canted ferroelectric structure where Bi 3+ cations exhibit both polar and antipolar displacements along the orthogonal [110] p and [110] p pseudocubic directions, respectively, and are combined with antiphase octahedral tilting about the polar axis. Both the P nma and the I ma2 structural modifications exhibit a long-range antiferromagnetic ordering with a weak ferromagnetic component below T N ∼ 220 K. Analysis of the coupling between the dipole, magnetic, and elastic order parameters based on a general phenomenological approach revealed that the weak ferromagnetism in both phases is mainly caused by the presence of the antiphase octahedral tilting whose axial nature directly represents the relevant part of Dzyaloshinskii vector. The magnetoelectric contribution to the spontaneous magnetization allowed in the polar I ma2 phase is described by a fifth-degree free-energy invariant and is expected to be small.

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“…Furthermore, an additional low-symmetry monoclinic phase at the phase boundary was found, 10) which is pointed out to be one of the key issues for the enhancement of the piezoelectric properties.…”

Section: )10)mentioning

confidence: 99%

Composition dependence of crystal structure and electrical properties for epitaxial films of Bi(Zn1/2Ti1/2)O3-BiFeO3 solid solution system

Yazawa

Yasui

Morioka

et al. 2010

J. Ceram. Soc. Japan

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Epitaxial xBi(Zn 1/2 Ti 1/2 )O 3 (1 ¹ x)BiFeO 3 films were grown on (100) c SrRuO 3 ==(100)SrTiO 3 substrates by metal organic chemical vapor deposition (MOCVD). The effects of x value on the crystal structure and the electrical properties were investigated. Constituent phase changed from rhombohedral symmetry to two types of tetragonal ones with different unit cell volume and tetragonality. Rhombohedral phase and the tetragonal phase with smaller tetragonality were not ascertained to transform to cubic phase up to 800°C from high temperature XRD results. Relative dielectric constant measured at room temperature showed the maximum value at x = 0.21 near the phase boundary between tetragonal and rhombohedral symmetries. Leakage current became small when the measurement temperature decreased at 80 K and the ferroelectricity monotonously decreased with increasing x values and was not ascertained above 0.26.

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Rhombohedral–Tetragonal Phase Boundary with High Curie Temperature in (1-x)BiCoO₃–xBiFeO₃ Solid Solution

Cited by 96 publications

References 19 publications

Composition control and thickness dependence of {100}-oriented epitaxial BiCoO3–BiFeO3 films grown by metalorganic chemical vapor deposition

Composition control and thickness dependence of {100}-oriented epitaxial BiCoO3–BiFeO3 films grown by metalorganic chemical vapor deposition

Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

Composition dependence of crystal structure and electrical properties for epitaxial films of Bi(Zn1/2Ti1/2)O3-BiFeO3 solid solution system

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Rhombohedral–Tetragonal Phase Boundary with High Curie Temperature in (1-x)BiCoO3–xBiFeO3 Solid Solution

Cited by 96 publications

References 19 publications

Composition control and thickness dependence of {100}-oriented epitaxial BiCoO3–BiFeO3 films grown by metalorganic chemical vapor deposition

Composition control and thickness dependence of {100}-oriented epitaxial BiCoO3–BiFeO3 films grown by metalorganic chemical vapor deposition

Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

Composition dependence of crystal structure and electrical properties for epitaxial films of Bi(Zn1/2Ti1/2)O3-BiFeO3 solid solution system

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Rhombohedral–Tetragonal Phase Boundary with High Curie Temperature in (1-x)BiCoO₃–xBiFeO₃ Solid Solution