El camp central dels treballs del grup és l'estudi i la caracterització de materials per a la seva aplicació en dispositius i/o circuits. Els materials estudiats són ceràmiques i compòsits piezoelèctrics, per a les seves aplicacions en microelectrònica i optoelectrònica. L‘atenció preferent se centra en l'anàlisi i la caracterització del comportament no lineal de materials, dispositius i circuits, i en l’estudi de la relació entre les condicions d'obtenció, el desordre estructural i les propietats de transport electrònic en polímers i materials orgànics conductors. L'estudi no lineal és necessari en les aplicacions en dispositius ultrasònics que utilitzen transductors ressonants. La caracterització no lineal de convertidors electrònics commutats DC-DC sotmesos tant a controls clàssics com moderns (diagrames de bifurcacions, dinàmiques quasiperiòdiques i caòtiques...) està orientada al disseny.

Pàgina web del grup de recerca

Recent Submissions

  • 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 ...
  • Physics laboratory experiments at the Barcelona Faculty of Nautical Studies 

    Isalgué Buxeda, Antonio; Ochoa Guerrero, Diego A. (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
    Conference lecture
    Open Access
  • 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
    Restricted access - publisher's policy
    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 ...
  • High-precision time-of-flight determination algorithm for ultrasonic flow measurement 

    Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; García García, José Eduardo (2019)
    Article
    Open Access
    Commercial time-of-flight (TOF) ultrasonic flowme- ters are rapidly expanding in the general industry. Among the different techniques that can be applied to determine the TOF of ultrasonic waves, the cross-correlation ...
  • Bifurcation patterns in homogeneous area-preserving piecewise-linear maps 

    Benadero García-Morato, Luis; Freire Macías, Emilio; Ponce Núñez, Enrique; Torres Peral, Francisco (2018-11-26)
    Article
    Restricted access - publisher's policy
    The dynamical behavior of a family of planar continuous piecewise linear maps with two zones is analyzed. Assuming homogeneity and preservation of areas we obtain a canonical form with only two parameters: the traces of ...
  • Suppression of undesired attractors in a self-oscillating H-bridge parallel resonant converters under zero current switching control 

    El Aroudi, Abdelali; Benadero García-Morato, Luis; Ponce, Enrique; Olalla Martinez, Carlos; Torres Peral, Francisco; Martínez Salamero, Luis (2018-11-08)
    Article
    Restricted access - publisher's policy
    Resonant converters under zero current switching control strategy can exhibit coexistence of attractors, making it difficult the startup of the system from zero initial conditions. In this paper, the problem of multiple ...

View more