Lattice dynamics of BiFeO3: The untypical behavior of the ferroelectric instability under hydrostatic pressure

Зиненко, В. И.; Pavlovskiĭ, M. S.

doi:10.1134/s0021364008060052

Cited by 16 publications

(6 citation statements)

References 9 publications

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“…As hydrostatic pressure is applied at low temperatures, the rhombohedral R3c structure is theoretically expected to transform into the non-polar orthorhombic P nma structure [64,65,[103][104][105]. The critical pressure has been estimated variously between 3 GPa and 20 GPa, whereas experimentally it was found to be ≈10 GPa [106][107][108].…”

Section: Introduction To Structurementioning

confidence: 99%

Structure and spin dynamics of multiferroic BiFeO₃

Park

Jeong

et al. 2014

J. Phys.: Condens. Matter

115

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Multiferroic materials have attracted much interest due to the unusual coexistence of ferroelectric and (anti-)ferromagnetic ground states in a single compound. They offer an exciting platform for new physics and potentially novel devices. BiFeO3 is one of the most celebrated multiferroic materials and has highly desirable properties. It is the only known room-temperature multiferroic with TC ≈ 1100 K and TN ≈ 650 K, and exhibits one of the largest spontaneous electric polarisations, P ≈ 80 µC cm(-2). At the same time, it has a magnetic cycloid structure with an extremely long period of 620 Å, which arises from competition between the usual symmetric exchange interaction and the antisymmetric Dzyaloshinskii-Moriya (DM) interaction. There is also an intriguing interplay between the DM interaction and single ion anisotropy K. In this review, we have attempted to paint a complete picture of bulk BiFeO3 by summarising the structural and dynamic properties of both the spin and lattice parts and their magneto-electric coupling.

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Section: Introduction To Structurementioning

confidence: 99%

Structure and spin dynamics of multiferroic BiFeO₃

Park

Jeong

et al. 2014

J. Phys.: Condens. Matter

115

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“…As hydrostatic pressure is applied at low temperatures, the rhombohedral R3c structure is expected theoretically to transform into the non-polar orthorhombic Pnma structure [65,66,[104][105][106]. The critical pressure was estimated variously between 3 and 20 GPa, whereas experimentally it was found to be ≈10 GPa [107][108][109].…”

Section: Introduction To Structurementioning

confidence: 99%

Structure and spin dynamics of multiferroric BiFeO$_3$

Park,

Le,

Jeong

et al. 2014

Preprint

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Multiferroic materials have attracted much interest due to the unusual coexistence of ferroelectric and (anti-)ferromagnetic ground states in a single compound. They offer an exciting platform for new physics and potentially novel devices. BiFeO 3 is one of the most celebrated of multiferroic materials with highly desirable properties. It is the only known room-temperature multiferroic with T C ≈ 1100 K and T N ≈ 650 K, and exhibits one of the largest spontaneous electric polarisation, P ≈ 80 µC/cm 2 . At the same time, it has a magnetic cycloid structure with an extremely long period of 630 Å, which arises from a competition between the usual symmetric exchange interaction and antisymmetric Dzyaloshinskii-Moriya (DM) interaction. There is also an intriguing interplay between the DM interaction and the single ion anisotropy K. In this review, we have tried to paint a complete picture of bulk BiFeO 3 by summarising the structural and dynamical properties of both spin and lattice parts, and their magneto-electric coupling.

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“…Within the ±8 GPa range, P increases almost linearly from 75.5 to 97.1 μC cm −2 ; then P increases slowly for − σ 33 > 8 GPa, whereas it decreases sharply for − σ 33 < −8 GPa. These results indicate that the uniaxial stress applied along the polarization axis could modify the polarization greatly, which is in contrast to negligible changes of the relative atomic coordinates and polarization of BiFeO 3 under hydrostatic pressure …”

Section: Calculated Lattice Constants (A and C In å) Polarization (Pmentioning

confidence: 88%

“…These results indicate that the uniaxial stress applied along the polarization axis could modify the polarization greatly, which is in contrast to negligible changes of the relative atomic coordinates and polarization of BiFeO 3 under hydrostatic pressure. [32] In a ferroelectric material, an effective built-in electric field due to electric polarization could dissociate electron-hole pairs and increase the drift length of charge carriers. Thus polarization could significantly enhance the density of photocurrent.…”

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confidence: 99%

Ferroelectricity and Elasticity of Rhombohedral BiFeO₃ Under Uniaxial Stress

Dong

et al. 2018

Physica Rapid Research Ltrs

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We report on first‐principles calculations of electric polarization in multiferroic rhombohedral BiFeO3 under the [111] uniaxial stress, and our results suggest that the polarization varies nearly linearly from 75.5 to 97.1 μC cm−2 within the stress range of 8 to −8 GPa. The change of polarization is mainly due to atomic displacements since the calculated Born effective charges barely change under stress. We also compute the elastic stiffness coefficients and the elastic compliance coefficients, and these results demonstrate that the rhombohedral structure of BiFeO3 remains stable under the uniaxial stress between 8 and −8 GPa. Because in a ferroelectric‐based photovoltaic cell the photocurrent is proportional to the magnitude of electric polarization, it is possible to improve the photovoltaic efficiency of BiFeO3 thin film by applying uniaxial stress.

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Lattice dynamics of BiFeO3: The untypical behavior of the ferroelectric instability under hydrostatic pressure

Cited by 16 publications

References 9 publications

Structure and spin dynamics of multiferroic BiFeO₃

Structure and spin dynamics of multiferroic BiFeO₃

Structure and spin dynamics of multiferroric BiFeO$_3$

Ferroelectricity and Elasticity of Rhombohedral BiFeO₃ Under Uniaxial Stress

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Lattice dynamics of BiFeO3: The untypical behavior of the ferroelectric instability under hydrostatic pressure

Cited by 16 publications

References 9 publications

Structure and spin dynamics of multiferroic BiFeO3

Structure and spin dynamics of multiferroic BiFeO3

Structure and spin dynamics of multiferroric BiFeO$_3$

Ferroelectricity and Elasticity of Rhombohedral BiFeO3 Under Uniaxial Stress

Contact Info

Product

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About

Structure and spin dynamics of multiferroic BiFeO₃

Structure and spin dynamics of multiferroic BiFeO₃

Ferroelectricity and Elasticity of Rhombohedral BiFeO₃ Under Uniaxial Stress