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Pure perovskite BiFeO3–BaTiO3 ceramics prepared by reaction flash sintering of Bi2O3–Fe2O3–BaTiO3 mixed powders
(2021-06)
Article
Restricted access - publisher's policyIn this work, the 0.67BiFeO3-0.33BaTiO3 ferroelectric ceramic was prepared by Reaction Flash Sintering (RFS). This preparation technique combines synthesis and sintering in a single Flash experiment. The starting oxides ... -
Exploring the electromechanical response and electric field-induced dielectric anomalies in PMN–PT electroceramics
(2021-06-23)
Article
Open Access<jats:p> Electromechanical and dielectric properties of PMN–PT ferroelectric ceramics are investigated. In particular, dielectric response studies focus on the investigation of the influence of the DC applied electric field ... -
Photocontrolled strain in polycrystalline ferroelectrics via domain engineering strategy
(2021-05-05)
Article
Restricted access - publisher's policyThe use of photonic concepts to achieve nanoactuation based on light triggering requires complex architectures to obtain the desired effect.In thiscontext, the recent discoveryof reversible optical control of the domain ... -
((R)-(-)-3-Hydroxyquinuclidium)[FeCl4]; a plastic hybrid compound with chirality, ferroelectricity and long range magnetic ordering
(Royal Society of Chemistry (RSC), 2021-02-16)
Article
Restricted access - publisher's policyQuinuclidinium salts and their derivatives are now in the focus of materials science as building units of multifunctional materials. Their properties can be easily switchable, allowing their use in a wide range of physical ... -
Toward a new PTCR material based on the Na2Ti6O13/Na2Ti3O7 system
(2021-08)
Article
Restricted access - publisher's policyMixed phases of sodium titanate ceramics are obtained using both conventional and laser sintering methods. It was observed a clear dependence on the structural, microstructural and electrical resistivity with the employed ... -
Performance assessment of ultrasonic waves for bubble control in cryogenic fuel tanks
(2020-05-27)
Article
Restricted access - publisher's policyAn efficient long-term storage of cryogenic propellants is a challenge for future space exploration missions. The vapour bubbles formed as a result of boil-off in the tank walls can generate foam structures, which could ... -
Polymorphic phase boundary in piezoelectric oxides
(American Institute of Physics (AIP), 2020-04-01)
Article
Open AccessThe design of phase boundaries has now become a consolidated strategy to improve the functional properties of piezoelectric oxides because of the unique properties that may be obtained in their vicinity. In particular, ... -
Dynamic analysis of self-oscillating H-bridge inverters with state feedback
(2020-01)
Article
Open AccessThis paper presents a comprehensive approach to analyze the dynamics of a generalized model of resonant inverters using nonsmooth dynamical system theory. The model simultaneously covers both parallel and series resonant ... -
Evidence for a dynamics crossover and its implication on the freezing temperature determination of relaxor ferroelectrics
(Institute of Physics (IOP), 2019-09-27)
Article
Open AccessRelaxor ferroelectrics are characterized by a broadened and dispersive permittivity peak in their temperature-dependent dielectric spectra. Although several models have been proposed to explain the nature of these materials, ... -
Delay effects on the limit cycling behavior in resonant inverters with state feedback
(2019-10-01)
Article
Restricted access - publisher's policyBifurcations of limit cycles in an H-bridge LC resonant inverter are reexamined taking into account a time delay in the switching transition. The analysis is accomplished by means of a model of the inverter that compresses, ... -
The generalized Vogel-Fulcher-Tamman equation for describing the dynamics of relaxor ferroelectrics
(Nature, 2019-08-27)
Article
Open AccessRelaxor ferroelectrics (RF) are outstanding materials owing to their extraordinary dielectric, electromechanical, and electro-optical properties. Although their massive applications, they remain to be one of the most ... -
Groundwater hydrodynamics of an Eastern Africa coastal aquifer, including La Niña 2016–17 drought
(Elsevier, 2019-04-15)
Article
Open AccessIn 2016–17 much of East Africa was affected by a severe drought which has been attributed to Indian Ocean Dipole and El Niño Southern Oscillation conditions. Extreme events such as this have immediate and knock-on effects ...
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