Journal ArticleDOI
Dipole spring ferroelectrics in superlattice SrTiO3/BaTiO3 thin films exhibiting constricted hysteresis loops
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TLDR
In this article, a phase-field approach was employed to simulate the domain structure and switching of a (BaTiO3)8/(SrTiO 3)3 superlattice film constrained by a GdScO3 substrate.Abstract:
Ferroelectric superlattice heterostructures have recently been explored for potential applications in electronic devices. In this letter, we employed the phase-field approach to simulate the domain structure and switching of a (BaTiO3)8/(SrTiO3)3 superlattice film constrained by a GdScO3 substrate. A constricted ferroelectric hysteresis loop was observed with a high saturation polarization but a small coercive field. The shape of the hysteresis loop is understood by analyzing the ferroelectric polarization distributions during switching. It is demonstrated that the multilayers stack behaves as dipole spring ferroelectric, named in analogy to exchange spring magnets in magnetic multilayers that show similar loops.read more
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Journal ArticleDOI
Elastic strain engineering of ferroic oxides
Darrell G. Schlom,Long Qing Chen,Craig J. Fennie,Venkatraman Gopalan,David A. Muller,Xiaoqing Pan,Ramamoorthy Ramesh,Reinhard Uecker +7 more
TL;DR: In this paper, the use of elastic strain to enhance ferroics is discussed, which can be used to enhance the properties of known ferroic oxides or to create new tunable microwave dielectrics with performance that rivals that of existing materials.
Journal ArticleDOI
Phase transitions and domain structures of ferroelectric nanoparticles: Phase field model incorporating strong elastic and dielectric inhomogeneity
TL;DR: In this article, an efficient numerical algorithm based on a Fourier spectral iterative perturbation method is proposed to accurately compute the electrostatic fields in 3D microstructures with arbitrary dielectric inhomogeneity and anisotropy.
Journal ArticleDOI
Stability of Polar Vortex Lattice in Ferroelectric Superlattices
Zijian Hong,Anoop R. Damodaran,Fei Xue,Shang-Lin Hsu,Shang-Lin Hsu,Jason Britson,Ajay K. Yadav,Ajay K. Yadav,Christopher T. Nelson,Christopher T. Nelson,Jianjun Wang,James F. Scott,Lane W. Martin,Lane W. Martin,Ramamoorthy Ramesh,Ramamoorthy Ramesh,Long Qing Chen +16 more
TL;DR: This work employs phase-field simulations, analytical theory, and experimental observations to evaluate thermodynamic conditions and geometric length scales that are critical for the formation of exotic vortex states in ferroelectric superlattices, and finds that the critical length is related to the intrinsic domain wall width.
Journal ArticleDOI
Characteristics and controllability of vortices in ferromagnetics, ferroelectrics, and multiferroics
Yue Zheng,W J Chen +1 more
TL;DR: This review summarizes the recent experimental and theoretical progress in ferroic vortices, with emphasis on those spin/dipole vortsices formed in nanoscale ferromagnetics and ferroelectrics, and those structural domain vortice formed in multiferroic hexagonal manganites.
Journal ArticleDOI
Blowing polar skyrmion bubbles in oxide superlattices
Zijian Hong,Long Qing Chen +1 more
TL;DR: In this article, the reversible switching between polar skyrmion bubbles and ordered vortex arrays in ferroelectric superlattices under an electric field, reminiscent of the Plateau-Raleigh instability in fluid mechanics, was discovered.
References
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Journal ArticleDOI
The exchange-spring magnet: a new material principle for permanent magnets
E. Kneller,R. Hawig +1 more
TL;DR: In this article, permanent magnets can be made of composite materials consisting of two suitably dispersed ferromagnetic and mutually exchange-coupled phases, one of which is hard magnetic in order to provide a high coercive field, while the other may be soft magnetic, just providing a high saturation J/sub s/, and should envelop the hard phase regions to prevent their corrosion.
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Journal ArticleDOI
Ferroelectric, dielectric and piezoelectric properties of ferroelectric thin films and ceramics
TL;DR: Ferroelectric, dielectric, and piezoelectric properties of ferroelectric thin films and ceramics are reviewed with the aim of providing an insight into different processes which may affect the behaviour of Ferroelectric devices.
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