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  • Polymorphic phase boundary in piezoelectric oxides 

    García García, José Eduardo; Rubio Marcos, Fernando (American Institute of Physics (AIP), 2020-04-01)
    Article
    Open Access
    The 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 

    Benadero García-Morato, Luis; Torres Peral, Francisco; Ponce Núñez, Enrique; El Aroudi, Abdelali (2020-01)
    Article
    Restricted access - publisher's policy
    This 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 

    Levit Valenzuela, Rafael; Ochoa Guerrero, Diego A.; Martínez García, Julio Cesar; García García, José Eduardo (Institute of Physics (IOP), 2019-09-27)
    Article
    Restricted access - publisher's policy
    Relaxor 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 

    Benadero García-Morato, Luis; El Aroudi, Abdelali; Ponce, Enrique (2019-10-01)
    Article
    Restricted access - publisher's policy
    Bifurcations 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 

    Levit Valenzuela, Rafael; Martínez García, Julio Cesar; Ochoa Guerrero, Diego A.; García García, José Eduardo (Nature, 2019-08-27)
    Article
    Open Access
    Relaxor 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 

    Ferrer Ramos, Nuria; Folch Sancho, Albert; Lane, Mike; Olago, Dan; Odida, Julius; Custodio Gimena, Emilio (Elsevier, 2019-04-15)
    Article
    Restricted access - publisher's policy
    In 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 

    Suñol Galofre, Francesc Xavier; González Cinca, Ricardo (2019-02-05)
    Article
    Open Access
    Bubble 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 

    Rubio Marcos, Fernando; Páez Margarit, David; Ochoa Guerrero, Diego A.; Del Campo Garcia, Angel Adolfo; Fernández Lozano, José Francisco; García García, José Eduardo (2019-04-02)
    Article
    Restricted access - publisher's policy
    Finding 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 

    Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; Suñé, Laura R.; García García, José Eduardo (2019)
    Article
    Open Access
    Ultrasonic 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 

    Cano Prieto, David; Lousa, Arturo; Esteve, Joan; Ferrer Anglada, Núria (2018-11-02)
    Article
    Restricted access - publisher's policy
    A 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 

    Ochoa Guerrero, Diego A.; Casals Mirones, Jorge Alejandro; Venet, Michel; M'Peko, Jean-Claude; García García, José Eduardo (American Institute of Physics (AIP), 2019-01-09)
    Article
    Open Access
    Dielectric 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 

    Ochoa Guerrero, Diego A.; Reyes Montero, Armando; Suñol Galofre, Francesc Xavier; Villafuerte Castrejón, Maria Elena; Pardo, Lorena; García García, José Eduardo (2019-02-05)
    Article
    Restricted access - publisher's policy
    The (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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