Ara es mostren els items 41-53 de 53

    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Photocontrolled strain in polycrystalline ferroelectrics via domain engineering strategy 

      Rubio Marcos, Fernando; Del Campo Garcia, Angel Adolfo; Ordoñez Pimentel, Jonathan; Venet, Michel; Rojas Hernández, Rocio E.; Páez Margarit, David; Ochoa Guerrero, Diego A.; Fernández Lozano, José Francisco; García García, José Eduardo (2021-05-05)
      Article
      Accés obert
      The use of photonic concepts to achieve nanoactuation based on light triggering requires complex architectures to obtain the desired effect.In thiscontext, the recent discoveryof reversible optical control of the domain ...
    • 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)
      Comunicació de congrés
      Accés obert
    • Preisach modeling of temperature-dependent ferroelectric response of piezoceramics at sub-switching regime 

      Ochoa Guerrero, Diego A.; García García, José Eduardo (2016-04)
      Article
      Accés obert
      The Preisach model is a classical method for describing nonlinear behavior in hysteretic systems. According to this model, a hysteretic system contains a collection of simple bistable units which are characterized by an ...
    • Preisach modelling of nonlinear response in electrically biased lead zirconate titanate-based piezoceramics 

      Ochoa Guerrero, Diego A.; Perez, Rafael A.; García García, José Eduardo (2013-09)
      Article
      Accés obert
      The alteration of the high-field electrical permittivity (nonlinear response) of PZT-based ceramics when an electrical bias field is applied is reported in this work. Large differences are observed between soft and hard ...
    • Raman scattering, microstructural and dielectric studies on Ba1-xCaxBi4Ti4O15 ceramics 

      Kumar, Sunil; Kundu, Swarup; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (2012-10)
      Article
      Accés restringit per política de l'editorial
      Polycrystalline powders of Ba1−xCaxBi4Ti4O15 (where x = 0, 0.25, 0.50, 0.75 and 1) were prepared via the conventional solid-state reaction route. X-ray diffraction (XRD) and Raman scattering techniques have been employed ...
    • Relaxor ferroelectric behavior and structural aspects of SrNaBi 2Nb 3O 12 ceramics 

      Kumar, Sunil; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (2012-04)
      Article
      Accés restringit per política de l'editorial
      The SrNaBi2Nb3O12 (SNBN) powder was prepared via the conventional solid-state reaction method. X-ray structural studies confirmed the phase to be a three-layered member of the Aurivillius family of oxides. The SNBN ceramics ...
    • Respuesta extrínseca y comportamiento no lineal en materiales cerámicos piezoeléctricos 

      Ochoa Guerrero, Diego A. (Universitat Politècnica de Catalunya, 2009-02-19)
      Tesi
      Accés obert
      The study of the elastic, dielectric and piezoelectric non-linear behavior in PZT-based and KNN-based piezoelectric ceramics represent the main goal of this work. Both systems present a perovskite-like structure. Several ...
    • Reversible optical control of magnetism in engineered artificial multiferroics 

      Ochoa Guerrero, Diego A.; Menéndez, Enric; López Sánchez, Jesús; Del Campo Garcia, Angel Adolfo; Ma, Zheng; Spasojevic, Irena; Fina, Ignasi; Fernández Lozano, José Francisco; Rubio Marcos, Fernando; Sort Viñas, Jordi; García García, José Eduardo (2024)
      Article
      Accés obert
      Optical means instead of electric fields may offer a new pathway for low-power and wireless control of magnetism, holding great potential to design next-generation memory and spintronic devices. Artificial multiferroic ...
    • Tailoring the microstructure by a proper electric current control in flash sintering: The case of barium titanate 

      López Blanco, Samuel; Ochoa Guerrero, Diego A.; Vendrell Vilafruella, Xavier; Mestres, Lourdes; García García, José Eduardo (Elsevier, 2022-10)
      Article
      Accés obert
      Flash sintering is arousing growing interest because high-density ceramics can be obtained at lower temperatures and shorter dwell times than conventional sintering. However, not only temperature and dwell times should be ...
    • 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
      Accés obert
      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 ...
    • Understanding the piezoelectric properties in potassium-sodium niobate-based lead-free piezoceramics: interrelationship between intrinsic and extrinsic factors 

      Rubio-Marcos, Fernando; Fernández Lozano, José Francisco; Ochoa Guerrero, Diego A.; García García, José Eduardo; Rojas-Hernandez, Rocio E.; Castro, Miriam; Ramajo, Leandro (Elsevier, 2017-09)
      Article
      Accés obert
      Lead zirconate titanate (PZT) based ceramics are currently enjoying a wide use in piezoelectric devices despite lead toxicity. Due to growing environmental concerns, the attention on piezoelectric ceramics has been moving ...
    • Unfolding kinetic fragility in relaxor ferroelectrics 

      Martínez García, Julio Cesar; Levit Valenzuela, Rafael; Ochoa Guerrero, Diego A.; García García, José Eduardo (American Institute of Physics (AIP), 2021-10-07)
      Article
      Accés obert
      The fragility parameter is one of the most important material constants that is extensively used in glass science, playing a central role in the enhancement of the understanding the glass formation process of disordered ...