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

  • 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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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
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    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 ...
  • La3+-induced (micro)structural changes and origin of the relaxor-like phase transition in ferroelectric lead barium niobate electroceramics 

    Venet, Michel; Zabotto, Fabio L.; García García, José Eduardo; Ochoa Guerrero, Diego A.; García, Ducinei; Eiras, Jose A.; M'Peko, Jean-Claude (Springer, 2014-04-01)
    Article
    Open Access
    Lead barium niobate (Pb1-x Ba (x) Nb2O6, PBN) ferroelectric materials have been and are the subject of numerous studies in literature due to their potential for wide-ranging applications in the electronic industry. In this ...
  • Analysis of bifurcation behavior of a piecewise linear vibrator with electromagnetic coupling for energy harvesting applications 

    El Aroudi, Abdelali; Ouakad, Hassen; Benadero García-Morato, Luis; Younis, Mohammad (2014-05)
    Article
    Restricted access - publisher's policy
    Recently, nonlinearities have been shown to play an important role in increasing the extracted energy of vibration-based energy harvesting systems. In this paper, we study the dynamical behavior of a piecewise linear (PWL) ...
  • Fabrication of melt-textured cylinders and bars of (YBa2Cu3O7-Y2BaCuO5) superconductors 

    Piñol Vidal, Salvador; Yu, R; Vilalta, Nuria; Sandiumenge, Felip; Gomis Arbonès, Vicente; Martínez, Benjamín; Mora Serrano, Javier; Fontcuberta, Josep; Obradors Berenguer, Xavier (1996)
    Conference lecture
    Restricted access - author's decision
    Cylinders and bars of bulk YBa2CuO7-Y2BaCuO5 textured ceramic composites (123-211) have been prepared through different directional solidification processes. Green ceramic preforms for the directional solidification process ...
  • Nonlinear dielectric response of BaBi4Ti4O15 ceramics 

    Kumar, Sunil; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (2013-02-05)
    Article
    Restricted access - publisher's policy
    Nonlinear dielectric response of BaBi 4 Ti 4 O 15 ceramics synthesized via the conventional solid-state reaction route has been monitored over a wide range of electric field strengths (E 0 = 0.5-5 kV/cm). Dielectric ...

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