Ultrafast Switching of the Electric Polarization and Magnetic Chirality in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>BiFeO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>by an Electric Field

Bhattacharjee, Satadeep; Rahmedov, Dovran; Wang, Dawei; Íñiguez, Jorgé; Bellaïche, L.

doi:10.1103/physrevlett.112.147601

Cited by 49 publications

(32 citation statements)

References 48 publications

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“…This H eff is then used for molecular dynamics (MD) simulations, as detailed in Refs. 27,28 , which have successfully reproduced ground state properties of bulk R3c phase of BFO in the antiferromagnetic state 27 . The R and T phases are simulated with a 48×48×6 (containing 69,120 atoms) supercell in terms of the 5-atom perovskite cell, to allow mechanisms involving nucleation and/or growth of domains having large lateral sizes to occur, if energetically favorable.…”

Section: Methodsmentioning

confidence: 63%

Intrinsic polarization switching mechanisms inBiFeO3

Garcia

Fusil

et al. 2017

Phys. Rev. B

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A first-principles-based effective Hamiltonian technique is used to investigate the polarization switching mechanisms in two polymorphic phases of BiFeO3 (BFO) having no defects. The switching mechanism is homogeneous for any switching field in the rhombohedral phase, while in the supertetragonal phase it changes from the classical nucleation and domain-wall motion to nucleationlimited-switching with virtually no propagation, and then to homogeneous switching with increasing electric field. The first two inhomogeneous switching mechanisms of the super-tetragonal phase of BFO are thus intrinsic in nature, and can be well described by the classical and nucleation-limited switching models, respectively. The reason behind their absence in the rhombohedral phase is also indicated. Moreover, the field-induced changes of switching mechanism within the super-tetragonal phase are further elucidated from an energetic point of view.

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Section: Methodsmentioning

confidence: 63%

Intrinsic polarization switching mechanisms inBiFeO3

Garcia

Fusil

et al. 2017

Phys. Rev. B

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“…In particular, it accurately predicts the antiferroelectric phase transition and the dipole pattern associated with it, electric hysteresis loops and PbZrO 3 behavior under pressure. The Curie point of 946 K, however, overestimates the experimental value of 503 K. It should be noted that the effective Hamiltonian approach has been widely used to predict numerous properties of ferroelectrics, multiferroics and related materials [18][19][20][21][22] To decouple contributions from the surface effects, depolarizing field and epitaxial strain on the properties and phases of PbZrO 3 ultrathin films we simulate different mechanical and electrical boundary conditions. Technically, mechanical boundary conditions are simulated by freezing some components of the strain tensor to model epitaxial strain in the range of -2% to 2%.…”

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confidence: 99%

Critical Thickness for Antiferroelectricity inPbZrO3

et al. 2015

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“…Examples [2][3] where L is an antiferromagnetic vector, and (2) the spin-current model [4][5][6] for which ΔE ~ (P×e ij )·(m i ×m j ), where e ij is the unit vector joining the magnetic cations at sites i and j whose magnetic moments are given by m i and m j , respectively. This second type is responsible for non-trivial effects, such as the electric-field-driven change of the propagation direction [7,8] and reversal of the chirality [9] of magnetic cycloids. [Note that couplings being linear in P and potentially permitting magnetization switching can occur in other less-studied structures, such as ilmenites [10].]…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric effects via pentalinear interactions

et al. 2015

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Magnetoelectric multiferroic materials, particularly with the perovskite structure, are receiving a lot of attention because of their inherent coupling between electrical polarization and magnetic ordering. However, very few types of direct coupling between polarization and magnetization are known, and it is unclear whether they can be useful to the design of spintronic devices exploiting the control of magnetization by electric fields. For instance, the typical bi-quadratic coupling only allows to change the magnitude of the magnetization by an electric field, but it does not permit an electric-field-induced switching of the magnetization. Similarly, the so-called Lifshitz invariants allow an electric-field control of complicated magnetic orderings, but not of the magnetization. Here, we report the discovery of original direct couplings between polarization and magnetization in epitaxial perovskite films, via the use of first-principles methods and the development of an original Landau-type phenomenological theory. Our results feature penta-linear interactions involving the ferromagnetic and anti-ferromagnetic vectors as well as the polar distortions and oxygen octahedral tilting, and permit a number of striking effects. Examples include a continuous electric-field control of the magnetization magnitude and sign, and the discrete switching of the magnetization magnitude. Thus, the high-order, penta-linear couplings demonstrated in this work may open paths towards specific magneto-electric effects, as well as, spintronic and magnonic devices.2

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Ultrafast Switching of the Electric Polarization and Magnetic Chirality inBiFeO3by an Electric Field

Cited by 49 publications

References 48 publications

Intrinsic polarization switching mechanisms inBiFeO3

Intrinsic polarization switching mechanisms inBiFeO3

Critical Thickness for Antiferroelectricity inPbZrO3

Magnetoelectric effects via pentalinear interactions

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