Journal ArticleDOI
Phase-field method of phase transitions/domain structures in ferroelectric thin films: A review
TLDR
In this article, the phase-field approach is applied to inhomogeneous systems containing domain structures and it is demonstrated that using a set of independently measured thermodynamic parameters for the corresponding bulk single crystals, the phase field approach is able to quantitatively predict not only the strain effect on phase transition temperatures but also the correct ferroelectric domain structures for a given strain and temperature.Abstract:
This article briefly reviews recent applications of phase-field method to ferroelectric phase transitions and domain structures in thin films. It starts with a brief introduction to the thermodynamics of coupled electromechanical systems and the Landau description of ferroelectric transitions in homogeneous ferroelectric single crystals. The thermodynamic potentials of a homogeneous crystal under different mechanical boundary conditions are presented, including the thin-film boundary conditions. The phase-field approach to inhomogeneous systems containing domain structures is then outlined. It describes a domain structure using the spatial distribution of spontaneous polarization. The evolution of a domain structure towards equilibrium is driven by the reduction in the total-free energy of an inhomogeneous domain structure including the chemical driving force, domain wall energy, electrostatic energy as well as elastic energy. A number of examples are discussed, including phase transitions and domain stability in ferroelectric thin films and superlattices. It is demonstrated that using a set of independently measured thermodynamic parameters for the corresponding bulk single crystals, the phase-field approach is able to quantitatively predict not only the strain effect on phase transition temperatures but also the correct ferroelectric domain structures for a given strain and temperature.read more
Citations
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Journal ArticleDOI
Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films
TL;DR: This Review tries to summarize what remarkable progress in multiferroic magnetoelectric composite systems has been achieved in most recent few years, with emphasis on thin films; and to describe unsolved issues and new device applications which can be controlled both electrically and magnetically.
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Potassium-sodium niobate lead-free piezoelectric materials: past, present, and future of phase boundaries.
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Phase-field models in materials science
TL;DR: In this article, the authors reviewed the application of the phase-field method in different fields of materials science, including elastic interactions and fluid flow in multi-grain multi-phase structures in multicomponent materials.
Journal ArticleDOI
Observation of polar vortices in oxide superlattices
Ajay K. Yadav,Ajay K. Yadav,Christopher T. Nelson,Christopher T. Nelson,Shang-Lin Hsu,Shang-Lin Hsu,Zijian Hong,James D. Clarkson,Christian M. Schlepütz,Anoop R. Damodaran,Padraic Shafer,Elke Arenholz,Liv R. Dedon,Deyang Chen,Ashvin Vishwanath,Ashvin Vishwanath,Andrew M. Minor,Andrew M. Minor,Andrew M. Minor,Long Qing Chen,James F. Scott,Lane W. Martin,Lane W. Martin,Ramamoorthy Ramesh,Ramamoorthy Ramesh +24 more
TL;DR: In this paper, the authors used the competition between charge, orbital and lattice degrees of freedom in superlattices of alternating lead titanate and strontium titanate layers to produce complex topologies of electrical polarization.
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Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
TL;DR: A series of milestones and steady progress in the past decade have enabled our understanding of multiferroic physics substantially comprehensive and profound, which is further pushing forward the research frontier of this exciting area.
References
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Book
Theory of structural transformations in solids
TL;DR: Theory of structural transformations in solids as mentioned in this paper, Theory of structural transformation of solids, and structural transformation in the solids. But, the structural transformations are not necessarily symmetric.
Journal ArticleDOI
Room-temperature ferroelectricity in strained SrTiO3.
J. H. Haeni,Patrick Irvin,Wontae Chang,Reinhard Uecker,P. Reiche,Y. L. Li,Somnath Choudhury,Wei Tian,Marilyn E. Hawley,B. Craigo,Alexander K. Tagantsev,Xiaoqing Pan,Stephen K. Streiffer,Long Qing Chen,Steven W. Kirchoefer,Jeremy Levy,Darrell G. Schlom +16 more
TL;DR: It is shown that epitaxial strain from a newly developed substrate can be harnessed to increase Tc by hundreds of degrees and produce room-temperature ferro electricity in strontium titanate, a material that is not normally ferroelectric at any temperature.
Journal ArticleDOI
Enhancement of ferroelectricity in strained BaTiO3 thin films.
Kyoung Jin Choi,Michael D. Biegalski,Yulan Li,Alok Sharan,Jürgen Schubert,Reinhard Uecker,P. Reiche,Y. B. Chen,Xiaoqing Pan,Venkatraman Gopalan,Long Qing Chen,Darrell G. Schlom,Chang-Beom Eom +12 more
TL;DR: This work demonstrates a route to a lead-free ferroelectric for nonvolatile memories and electro-optic devices.
Journal ArticleDOI
Effect of Mechanical Boundary Conditions on Phase Diagrams of Epitaxial Ferroelectric Thin Films
TL;DR: In this paper, a phenomenological thermodynamic theory of ferroelectric thin films epitaxially grow on cubic substrates is developed using a new form of the thermodynamic potential, which corresponds to the ac tual mechanical boundary conditions of the problem.