Random electric field instabilities of relaxor ferroelectrics
نویسندگان
چکیده
منابع مشابه
Influence of electric field on local phase transformations in relaxor ferroelectrics PbSc0.5Ta0.5O3 and Pb0.78Ba0.22Sc0.5Ta0.5O3
In situ temperature-dependent Raman-scattering experiments under an external dc electric field E have been performed on (PST-Ba) in order to give further insights into the atomistic mechanism of polar coupling in perovskite-type (ABO 3) relaxor ferroelectrics near the intermediate characteristic temperature T ?. The polarized Raman spectra collected under an electric field E applied along the c...
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A first-principles-based effective Hamiltonian is used to investigate low-temperature properties of Ba(Zr,Ti)O(3) relaxor ferroelectrics under an increasing dc electric field. This system progressively develops an electric polarization that is highly nonlinear with the dc field. This development leads to a maximum of the static dielectric response at a critical field, E(th), and involves four d...
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We study a dynamic model of relaxor ferroelectrics based on the spherical random-bond—random-field model and the Langevin equations of motion written in the representation of eigenstates of the random interaction matrix. The solution to these equations is obtained in the long-time limit where the system reaches an equilibrium state in the presence of random local electric fields. The complex dy...
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(111)-oriented and random oriented Pb0.8Ba0.2ZrO3 (PBZ) perovskite relaxor ferroelectric thin films were fabricated on Pt(111)/TiOx/SiO2/Si substrate by sol-gel method. Nano-scaled antiferroelectric and ferroelectric two-phase coexisted in both (111)-oriented and random oriented PBZ thin film. High dielectric tunability (i = 75%, E = 560 kV/ cm ) and figure-of-merit (FOM ~ 236) at room temperat...
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This paper covers the properties of relaxor ferroelectrics and considers the transition from the paraelectric state to the relaxor state comparing experimental data with the spherical random-bond randomfield model (SRBRF). It found that this model predicts and is experimental verifies a glassy state at the transition temperature for E < Ec and a ferroelectric state with quench random fields for...
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ژورنال
عنوان ژورنال: npj Quantum Materials
سال: 2017
ISSN: 2397-4648
DOI: 10.1038/s41535-017-0032-9