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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
Restricted access - publisher's policyThis 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
Restricted access - publisher's policyIn 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 ... -
Effects of gravity level on bubble detachment, rise, and bouncing with a free surface
(2019-02-05)
Article
Open AccessBubble detachment, rise, and bouncing upon impact with a free surface is studied experimentally in variable gravity conditions. Previous investigations focused on the effects of fluid properties such as ... -
Photo-controlled ferroelectric-based nanoactuators
(2019-04-02)
Article
Restricted access - publisher's policyFinding a feasible principle for a future generation of nano-optomechanical systems is a matter of intensive research, because it may provide new device prospects for optoelectronics and nanomanipulation techniques. Here ... -
Design and characterization of immersion ultrasonic transducers for pulsed regime applications
(2019)
Article
Open AccessUltrasonic transducer design is focused to maximize performance in specific applications, usually leading to a complex design and expensive construction and assembly. With the aim to overcome ... -
Low wear and low friction DLC coating with good adhesion to CoCrMo metal substrates
(2018-11-02)
Article
Restricted access - publisher's policyA challenge currently facing the orthopedics sector consists in the durability problems posed by joint prosthesis based on metal-on-metal contacts. While the diamond-like carbon (DLC)-based coating solves the shortcomings ... -
Dielectric and piezoelectric nonlinear properties of slightly textured lead barium niobate ceramics
(American Institute of Physics (AIP), 2019-01-09)
Article
Open AccessDielectric and piezoelectric responses of slightly textured, lead barium niobate ceramics are studied. The designed morphotropic phase boundary composition (Pb0.63Ba0.37Nb2O6) shows considerable nonlinear dielectric and ... -
Assessment of the functional properties stability in (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 piezoceramics: huge dielectric and piezoelectric nonlinearity
(2019-02-05)
Article
Restricted access - publisher's policyThe (Ba,Ca)(Zr,Ti)O3 ceramic system has received special attention in recent years because it may lead to promising lead-free piezoceramics. However, the stability of the functional properties of these materials is an ...
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