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

  • Nonlinear analysis of interconnected power converters: a case study 

    Benadero García-Morato, Luis; Cristiano, Rony; Pagano, Daniel J.; Ponce, Enrique (2015-09-01)
    Article
    Open Access
    In this paper the nonlinear dynamics of interconnected power converters in an islanded direct current (DC) microgrid is analyzed. By using a simplified scheme based on two cascaded converters we analyze the dynamical ...
  • Extrinsic contribution and instability properties in lead-based and lead-free piezoceramics 

    García García, José Eduardo (2015-11-01)
    Article
    Open Access
    Piezoceramic materials generally exhibit a notable instability of their functional properties when they work under real external conditions. This undesirable effect, known as nonlinear behavior, is mostly associated with ...
  • Stable p-doping in graphene and Terahertz spectroscopy 

    Ferrer Anglada, Núria; Gabriel Cortés, Daniel; Iqbal, M. Zahir; Eom, J. (2014)
    Conference report
    Open Access
  • THz-conductivity of CVD graphene on different substrates 

    Gabriel Cortés, Daniel; Sempere, Bernat; Colominas, Carles; Ferrer Anglada, Núria (Wiley-VCH, 2015-10-23)
    Article
    Restricted access - publisher's policy
    Optoelectronic properties of CVD graphene are charac-terized over a wide frequency range: THz, IR, visible and near-UV. We used Raman spectroscopy to characterize the synthesized graphene films. All graphene layers were ...
  • Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films 

    Vendrell Villafruella, Xavier; Raymond, Oscar; Ochoa Guerrero, Diego A.; García García, José Eduardo; Mestres, Lourdes (2015-02-27)
    Article
    Restricted access - publisher's policy
    Lead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films are grown on SrTiO3 substrates using the chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) is ...
  • Magnetoelectric response in (1-x)PbZr0.65Ti0.35O3-xBaFe(12)O(19) multiferroic ceramic composites 

    Guerra, Jose D. S.; Betal, Soutik; Pal, Madhuparna; García García, José Eduardo; Oliveira, Adilson J. A; M'Peko, Jean-Claude; Hernandes, Antonio Carlos; guo, Ruyan; Bhalla, Amar S. (2015-05-01)
    Article
    Open Access
    The magnetoelectric (ME) properties of PbZr0.65Ti0.35O3-BaFe12O19 (PZT-BaM) multiferroic ceramic composites have been investigated in this work. These materials, containing both the ferroelectric PZT and ferrimagnetic BaM ...
  • Microstructural features and functional properties of bilayered BaTiO3/BaTi1-xZrxO3 ceramics 

    Martins Amaral, Thiago; Antonelli, Eduardo; Ochoa Guerrero, Diego A.; García García, José Eduardo; Hernandes, Antonio Carlos (2015-04-01)
    Article
    Open Access
    Validity of mixture rule for dielectrics in series configuration and the correlation between microstructure and electrical properties in bilayered BaTiO3/BaTi1-xZrxO3 ceramics were studied. Samples were obtained from ...
  • High-frequency impedance of single-walled carbon nanotube networks on transparent flexible substrate 

    Iqbal, Muhammad Zahir; Pérez Puigdemont, Jordi; Eom, Jonghwa; Ferrer Anglada, Núria (2014-12-01)
    Article
    Restricted access - publisher's policy
    Transparent and flexible networks with randomly distributed single-walled carbon nanotubes (SWCNTs) are emerging as novel materials for various applications, particularly as electronic materials. We investigate the ...
  • Improving the functional properties of (K0.5Na0.5)NbO3 piezoceramics by acceptor doping 

    Vendrell Villafruella, Xavier; García García, José Eduardo; Bril, X; Ochoa Guerrero, Diego A.; Mestres, Lourdes; Dezanneau, Guillem (Elsevier, 2015-01-01)
    Article
    Restricted access - publisher's policy
    ZrO2 and TiO2 modified lead-free (K0.5Na0.5)NbO3 (KNN) piezoelectric ceramics are prepared by a conventional solid-state reaction. The effect of acceptor doping on structural and functional properties is investigated. A ...
  • Stability analysis of periodic orbits in a class of duffing-like piecewise linear vibrators 

    El Aroudi, Abdelali; Benadero García-Morato, Luis; Ouakad, Hassen; Younis, Mohammad (EDP Sciences, 2014)
    Conference lecture
    Open Access
    In this paper, we study the dynamical behavior of a Duffing-like piecewise linear (PWL) springmass-damper system for vibration-based energy harvesting applications. First, we present a continuous time single degree of ...

View more