Physics of Ferroic and Multiferroic Domain Walls

Catalán, Gustau

doi:10.1007/978-3-642-55375-2_9

Cited by 7 publications

(4 citation statements)

References 83 publications

(119 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While flipping along the long side of the tetragonal unit cell creates a ferroelectric-only 180°d omain wall instead, in which the a domain and c domain are formed head-to-tail with each other [15][16][17]. The domain wall is said to be continuous, which means it can only end in other domain walls or grain boundaries [18]. There are discontinuities of polarization in the perpendicular direction of domain walls, where the local displacements would be expected to accumulate.…”

Section: Introductionmentioning

confidence: 99%

Evolution of ferroelastic domain walls during phase transitions in barium titanate nanoparticles

Diao

Shi

Assefa

et al. 2020

Phys. Rev. Materials

View full text Add to dashboard Cite

In this work, ferroelastic domain walls inside BaTiO 3 (BTO) tetragonal nanocrystals are distinguished by Bragg peak position and studied with Bragg coherent x-ray diffraction imaging (BCDI). Convergence-related features of the BCDI method for strongly phased objects are reported. A ferroelastic domain wall inside a BTO crystal has been tracked and imaged across the tetragonal-cubic phase transition and proves to be reversible. The linear relationship of relative displacement between two twin domains with temperature is measured and shows a different slope for heating and cooling, while the tetragonality reproduces well over temperature changes in both directions. An edge dislocation is also observed and found to annihilate when heating the crystal close to the phase transition temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Evolution of ferroelastic domain walls during phase transitions in barium titanate nanoparticles

Diao

Shi

Assefa

et al. 2020

Phys. Rev. Materials

View full text Add to dashboard Cite

show abstract

“…An important factor which affects domain wall dynamics is the width of the walls, since thin walls are more likely to be pinned by point defects than thick walls. According to Catalan et al [60], domain walls which are both ferroelectric and ferroelastic are expected to be thinner than pure ferroelastic walls but thicker than purely ferroelectric walls. On the other hand, Jia et al [61] found that charged twin walls in PbZr 0.2 Ti 0.8 O 3 thin films are ∼10 times thicker than uncharged walls.…”

Section: Discussion and Conclusion: Acoustic Properties Of Domain Wal...mentioning

confidence: 99%

Order–disorder, ferroelasticity and mobility of domain walls in multiferroic Cu–Cl boracite

Fernández-Posada

Cochard

Gregg

et al. 2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Domain walls in Cu–Cl boracite develop as a consequence of an improper ferroelastic, improper ferroelectric transition, and have attracted close interest because some are conductive and all can be mechanically written and repositioned by application of an electric field. The phase transition and its associated dynamical properties have been analysed here from the perspective of strain and elasticity. Determination of spontaneous strains from published lattice parameter data has allowed the equilibrium long-range order parameter for F 4 ̄ 3c → Pca21 to be modelled simply as being close to the order–disorder limit. High acoustic loss in the cubic phase, revealed by resonant ultrasound spectroscopy, is consistent with the presence of dynamical microdomains of the orthorhombic structure with relaxation times in the vicinity of ∼10−5–10−6 s. Low acoustic loss in the stability field of the orthorhombic structure signifies, on the other hand, that ferroelastic twin walls which develop as a consequence of the order–disorder process are immobile on this time scale. A Debye loss peak accompanied by ∼1% elastic stiffening at ∼40 K is indicative of some freezing of defects which couple with strain or of some more intrinsic freezing process. The activation energy of ⩾∼0.01–0.02 eV implies a mechanism which could involve strain relaxation clouds around local ferroelectric dipoles or freezing of polarons that determine the conductivity of twin walls.

show abstract

“…136 In-depth information on the properties and potential applications of multiferroic domain walls can be found in refs. [137][138][139] .…”

Section: Multiferroic Domain Walls and Emergent Functional Propertiesmentioning

confidence: 99%

Multiferroic Materials: Physics and Properties

Palstra

Blake

2016

Reference Module in Materials Science and Materials Engineering

View full text Add to dashboard Cite

Multiferroics are materials in which magnetism and ferroelectricity coexist. They are of fundamental interest to understand electronic behavior coupling magnetic interactions and electric dipolar order. Moreover, they are of applied interest because they allow various types of novel magnetic and electric device structures. We distinguish two important classes of multiferroic materials and discuss mechanisms and materials belonging to each class separately. In the first group of multiferroics, magnetization and polarization arise independently from each other. In the second category of multiferroics, ferroelectricity is induced by magnetic order, resulting in strong magnetoelectric coupling. We also briefly discuss multiferroic thin film heterostructures showing interfacial magnetoelectric coupling interactions with potential applications in memory devices

show abstract

Physics of Ferroic and Multiferroic Domain Walls

Cited by 7 publications

References 83 publications

Evolution of ferroelastic domain walls during phase transitions in barium titanate nanoparticles

Evolution of ferroelastic domain walls during phase transitions in barium titanate nanoparticles

Order–disorder, ferroelasticity and mobility of domain walls in multiferroic Cu–Cl boracite

Multiferroic Materials: Physics and Properties

Contact Info

Product

Resources

About