Now showing items 1-12 of 94

    • ((R)-(-)-3-Hydroxyquinuclidium)[FeCl4]; a plastic hybrid compound with chirality, ferroelectricity and long range magnetic ordering 

      González Izquiero, Palmerina; Fabelo, Oscar; Canadillas Delgado, Laura; Beobide, Garikoitz; Vallcorba, Oriol; Salgado Beceiro, Jorge; Sánchez Andújar, Manuel; Martin, Carmen; Ruiz Fuentes, Javier; García García, José Eduardo; Fernández Díaz, Maria Teresa; de Pedro, Imanol (Royal Society of Chemistry (RSC), 2021-02-16)
      Article
      Restricted access - publisher's policy
      Quinuclidinium salts and their derivatives are now in the focus of materials science as building units of multifunctional materials. Their properties can be easily switchable, allowing their use in a wide range of physical ...
    • Toward a new PTCR material based on the Na2Ti6O13/Na2Ti3O7 system 

      Basilio, L.A.L.; Silva, J.H.L.; Xavier, F.; Aguilera, Lianet; Guerrero, Fidel; Antonelli, Eduardo; Anglada-Rivera, José; García García, José Eduardo; Silva, R.S.; Leyet, Yurimiler (2021-08)
      Article
      Restricted access - publisher's policy
      Mixed phases of sodium titanate ceramics are obtained using both conventional and laser sintering methods. It was observed a clear dependence on the structural, microstructural and electrical resistivity with the employed ...
    • Performance assessment of ultrasonic waves for bubble control in cryogenic fuel tanks 

      Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; Granados Jiménez, Marta; González Cinca, Ricardo; García García, José Eduardo (2020-05-27)
      Article
      Restricted access - publisher's policy
      An efficient long-term storage of cryogenic propellants is a challenge for future space exploration missions. The vapour bubbles formed as a result of boil-off in the tank walls can generate foam structures, which could ...
    • Bifurcation analysis in a self-oscillating series resonant converter 

      Ponce, Enrique; Benadero García-Morato, Luis; El Aroudi, Abdelali (De Gruyter Open Sp. z o.o., 2020-02-10)
      Part of book or chapter of book
      Restricted access - publisher's policy
      In this paper, the dynamics of a dc-ac resonant self-oscillating LC series inverter is analyzed from the point of view of piecewise smooth dynamical systems. The system under study is defined by two symmetric configurations ...
    • 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, ...
    • Performance assessment of ultrasonic waves for bubble control in LOX tanks 

      Suñol Galofre, Francesc Xavier; Ochoa Guerrero, Diego A.; Granados, Marta; García García, José Eduardo; González Cinca, Ricardo (2019)
      Conference lecture
      Open Access
    • 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
      Open Access
      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
      Open Access
      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
      Open Access
      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 ...