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Browsing by Subject "Cristalls ferroelectrics"

Now showing items 1-6 of 6

    • Ferroelectric materials for photovoltaics 

      Vázquez Calvo, Diego (Universitat Politècnica de Catalunya, 2017-09-07)
      Master thesis
      Open Access
      Ferroelectric photovoltaic has been intensively studied during the last years due to possible high efficient charge separation by presence of an internal electric field. Ferroelectric materials show permanent electrical ...

    • Frequency doubling in SBN crystal affected by poling and thermal treatment 

      Yao, Can (Universitat Politècnica de Catalunya, 2009-09-09)
      Master thesis
      Open Access
      The random anti-parallel micro-ferroelectric domains in SBN (Strontium-Barium Niobate, Sr0.61Ba0.39Nb2O3, ) crystal can be used for efficient nonlinear optical processes at different frequencies. The ferroelectric domains ...

    • Light generation and manipulation from nonlinear randomly distributed domains in SBN 

      Yao, Can (Universitat Politècnica de Catalunya, 2014-06-25)
      Doctoral thesis
      Open Access
      Disordered media with refractive index variations can be found in the atmosphere, the ocean, and in many materials or biological tissues. Several technologies that make use of such random media, as image formation, satellite ...

    • Light-induced capacitance tunability in ferroelectric crystals 

      Páez Margarit, David; Rubio Marcos, Fernando; Ochoa Guerrero, Diego A.; Del Campo Garcia, Angel Adolfo; Fernández Lozano, José Francisco; García García, José Eduardo (2018-07-05)
      Article
      Open Access
      The remote controlling of ferroic properties with light is nowadays a hot and highly appealing topic in materials science. Here, we shed light on some of the unresolved issues surrounding light–matter coupling in ferroelectrics. ...

    • Low temperature dielectric relaxation in ordinary perovskite ferroelectrics: enlightenment from high-energy x-ray diffraction 

      Ochoa Guerrero, Diego A.; Levit Valenzuela, Rafael; Fancher, Christopher M.; Esteves, Giovanni; Jones, Jacob L.; García García, José Eduardo (2017-04-26)
      Article
      Open Access
      Ordinary ferroelectrics exhibit a second order phase transition that is characterized by a sharp peak in the dielectric permittivity at a frequency-independent temperature. Furthermore, these materials show a low temperature ...

    • New insights into the optical control of macroscopic polarization in ferroelectric crystals 

      Páez Margarit, David (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access