Insight on the ferroelectric properties in a (BiFeO3)2(SrTiO3)4 superlattice from experiment and <i>ab initio</i> calculations

Bruyer, E.; Sayede, Adlane; Ferri, Anthony; Desfeux, Rachel; Mangalam, R. V. K.; Ranjith, R.; Prellier, W.

doi:10.1063/1.4927600

Cited by 12 publications

(14 citation statements)

References 38 publications

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“…-90 -50 -10 30 70 to small thicknesses, whereas electrostatically unstable surfaces will have similarly unhappy interfaces with SrTiO 3 and their ferroelectric polarization will tend to reverse [42]. All the examples that we have been able to find of experimental BiFeO 3 /SrTiO 3 superlattices and heterostructures have their as-grown polarization orientation in the direction which compensates the layer polarization, consistent with this assumption [48][49][50][51]. Likewise, literature calculations of PbTiO 3 /BiFeO 3 superlattices, with the polarization of the PbTiO 3 entirely in the plane of the superlattice [52], found a stable solution with BiFeO 3 in its happy configuration.…”

Section: B Interfaces Of Bismuth Ferrite With Centrosymmetric Ii/iv I...supporting

confidence: 72%

Layer and spontaneous polarizations in perovskite oxides and their interplay in multiferroic bismuth ferrite

Spaldin¹,

Efe²,

Rossell³

et al. 2021

Preprint

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We review the concept of surface charge, first in the context of the polarization in ferroelectric materials, and second in the context of layers of charged ions in ionic insulators. While the former is traditionally discussed in the ferroelectrics community, and the latter in the surface science community, we remind the reader that the two descriptions are conveniently unified within the modern theory of polarization. In both cases, the surface charge leads to electrostatic instability -the so-called "polar catastrophe" -if it is not compensated, and we review the range of phenomena that arise as a result of different compensation mechanisms. We illustrate these concepts using the example of the prototypical multiferroic bismuth ferrite, BiFeO3, which is unusual in that its spontaneous ferroelectric polarization and its layer charges can be of the same magnitude. As a result, for certain combinations of polarization orientation and surface termination its surface charge is self-compensating. We use density functional calculations of BiFeO3 slabs and superlattices, analysis of high-resolution transmission electron micrographs as well as examples from the literature to explore the consequences of this peculiarity.

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Section: B Interfaces Of Bismuth Ferrite With Centrosymmetric Ii/iv I...supporting

confidence: 72%

Layer and spontaneous polarizations in perovskite oxides and their interplay in multiferroic bismuth ferrite

Spaldin¹,

Efe²,

Rossell³

et al. 2021

Preprint

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“…[60][61][62]. A recent experiment found switchable ferroelectricity in BiFeO 3 bilayers sandwiched in SrTiO 3 layers [34]. These results were obtained for the [001]oriented BiFeO 3 with a surface or asymmetric terminations.…”

Section: Switchable Ferroelectricitymentioning

confidence: 56%

“…Meanwhile, the ferroelectric energy barrier is also lowered, as revealed in our calculation, which means the required switching field is also lowered. A recent experiment on a (BiFeO 3 ) 2 /(SrTO 3 ) 4 superlattice has confirmed the switching ability, with indeed a lowered coercive field (which is an advantage for the magnetoelectric coefficient) [34].…”

Section: Switchable Ferroelectricitymentioning

confidence: 79%

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Inversion of Ferrimagnetic Magnetization by Ferroelectric Switching via a Novel Magnetoelectric Coupling

et al. 2016

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Although several multiferroic materials or heterostructures have been extensively studied, finding strong magnetoelectric couplings for the electric field control of the magnetization remains challenging. Here, a novel interfacial magnetoelectric coupling based on three components (ferroelectric dipole, magnetic moment, and antiferromagnetic order) is analytically formulated. As an extension of carrier-mediated magnetoelectricity, the new coupling is shown to induce an electric-magnetic hysteresis loop. Realizations employing BiFeO_{3} bilayers grown along the [111] axis are proposed. Without involving magnetic phase transitions, the magnetization orientation can be switched by the carrier modulation driven by the field effect, as confirmed using first-principles calculations.

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“…4,12 To further increase the thickness of the T-BFO layer, new strategies like artificial superlattices composed of T-BFO and lattice-matched dielectrics can be exploited. 31,32 When the film thickness increases from 110 to 138 nm, the parent R phase appears (Figure S5 in the Supporting Information). It is known that the relaxation of M C -BFO to the R phase is bridged by low-symmetry intermediate phases, as manifested by the occurrence of local saw tooth-like patterns on the film surface.…”

Section: Resultsmentioning

confidence: 99%

Metastable Tetragonal BiFeO₃ Stabilized on Anisotropic a-Plane ZnO

Zhao

Yin

et al. 2021

Crystal Growth & Design

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The stabilization of the metastable tetragonal phase of BiFeO3 on the highly anisotropic ZnO(11-20) surface is reported. X-ray reciprocal space maps reveal that the BiFeO3 layer possesses true tetragonal symmetry rather than the monoclinic MC or MA structures. Heteroepitaxy generates strongly anisotropic misfit strains of 2.4 and −5.3% along two orthogonal ⟨110⟩ directions of tetragonal BiFeO3. Our analysis shows that such anisotropic strains are very powerful in tailoring the energy balance of competing phases, favoring the formation of tetragonal BiFeO3. Tetragonal BiFeO3 can be stabilized on the ZnO template up to a critical thickness of 110 nm, much larger than that of its monoclinic counterparts. The integration of such thick tetragonal BiFeO3 films with ZnO has important implications for future applications, as exemplified by the demonstration of a prototype metal/ferroelectric/semiconductor capacitor and the preparation of flexible tetragonal BiFeO3 nanomembranes. Additionally, the heteroepitaxial growth was also transposed to the integration of other perovskite oxides with ZnO. Our findings not only shed new light into the strain phase diagram of BiFeO3 but also open up a possible avenue toward oxide electronics.

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Insight on the ferroelectric properties in a (BiFeO3)2(SrTiO3)4 superlattice from experiment and ab initio calculations

Abstract: International audienceno abstrac

Cited by 12 publications

References 38 publications

Layer and spontaneous polarizations in perovskite oxides and their interplay in multiferroic bismuth ferrite

Layer and spontaneous polarizations in perovskite oxides and their interplay in multiferroic bismuth ferrite

Inversion of Ferrimagnetic Magnetization by Ferroelectric Switching via a Novel Magnetoelectric Coupling

Metastable Tetragonal BiFeO₃ Stabilized on Anisotropic a-Plane ZnO

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Insight on the ferroelectric properties in a (BiFeO3)2(SrTiO3)4 superlattice from experiment and ab initio calculations

Abstract: International audienceno abstrac

Cited by 12 publications

References 38 publications

Layer and spontaneous polarizations in perovskite oxides and their interplay in multiferroic bismuth ferrite

Layer and spontaneous polarizations in perovskite oxides and their interplay in multiferroic bismuth ferrite

Inversion of Ferrimagnetic Magnetization by Ferroelectric Switching via a Novel Magnetoelectric Coupling

Metastable Tetragonal BiFeO3 Stabilized on Anisotropic a-Plane ZnO

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Product

Resources

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Metastable Tetragonal BiFeO₃ Stabilized on Anisotropic a-Plane ZnO