Now showing items 1-18 of 18

  • Análise de Transiçao Resistiva e da irreversibilidade magnètica no superconductor YBACUO texturizado 

    Nunes, S.E.; Dias, F.T.; Vieira, V. N.; Schaf, J.; Roa Rovira, Joan Josep; Wolff-Fabris, F. (2012)
    Conference report
    Open Access
    Os supercondutores de alta temperatura crítica, em especial os granulares, apresentam uma transição resistiva que ocorre em duas etapas: a uma temperatura acima da temperatura crítica de transição Tc0, chamada de ...
  • Chemical introduced disorder effects on the critical current density and pinning mechanisms of YBa2-XSrXCu3O7-¿ 

    Flores, R. L.; Vieira, Valdemar das Neves; Teixeira Dias, Fábio; Pureur, P; Schaf, Jacob; Hneda, M; Roa Rovira, Joan Josep (2016)
    Article
    Open Access
    We report on isotherm ( T = 77.5 K) DC magnetization hysteresis loops of a series of YBa 2 -x Sr x Cu 3 O 7 - ¿ (x = 0, 0.02, 0.1, 0.25 and 0.37) single crystals with the purpose of studying the influence of chemically ...
  • Coated conductor technology for the beamscreen chamber of future high energy circular colliders 

    Puig Molina, Teresa; Krkotic, Patrick; Romanov, Artur; O'Callaghan Castellà, Juan Manuel; Gutiérrez Royo, Joffre (2019-09-01)
    Article
    Restricted access - publisher's policy
    The surface resistance of state-of-the-art REBa2Cu3O7-x coated conductors has been measured at 8 GHz versus temperature and magnetic field. We show that the surface resistance of REBa2Cu3O7-x strongly depends on the ...
  • Comparison between the magnetic irreversibility and zero resistance of high-quality melt-processed ybacuo superconductors 

    Teixeira Dias, Fábio; Vieira, Valdemar das Neves; Wolff-Fabris, Frederik; Kampert, Erik; Hneda, M; Schaf, Jacob; Farinela, G; Paiva Gouvêa, Cristol de; Roa Rovira, Joan Josep (2016)
    Article
    Open Access
    This paper portrays a detailed study of the magnetic irreversibility limit Tirr (H) and of the zero resistance point Tc0 (H) of three different top-seeding melt-textured YBa2Cu3O7-d superconducting samples, with well-aligned ...
  • Development of HPC multiphysics framework for HTS magnets in fusion 

    Lorenzo, José; Castillo-Reyes, Octavio; Granados García, Javier A.J.; Mantsinen, Mervi; Sáez, Xavier; Soba, Alejandro (Barcelona Supercomputing Center, 2019-05-07)
    Conference report
    Open Access
  • Experiments and model of intermodulation distortion in a rutile resonator with YBCO endplates 

    Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Menéndez Nadal, Óscar; O'Callaghan Castellà, Juan Manuel (KLUWER ACADEMIC/PLENUM PUBL, 2003-10-31)
    Article
    Open Access
    We have derived general equations to calculate intermodulation distortion in resonators with high temperature superconducting (HTS) films which are not restricted to a specific resonator shape and may be used whenever the ...
  • HTS nonlinearities in microwave disk resonators 

    Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Shaw, Timothy J.; O'Callaghan Castellà, Juan Manuel (ELSEVIER SCIENCE BV, 2002-08-31)
    Article
    Open Access
    This article describes a procedure for the calculation of the intermodulation behavior of the TM010 mode in high temperature superconducting (HTS) disk resonators from a description of the local HTS nonlinearities. Successful ...
  • Linealización de resonadores superconductores 

    Padilla Díaz, Alberto (Universitat Politècnica de Catalunya, 2008-07-24)
    Master thesis (pre-Bologna period)
    Open Access
    Los materiales superconductores de alta temperatura (HTS) permiten realizar dispositivos de muy altas prestaciones y dimensiones muy reducidas. Sin embargo, estos materiales presentan un comportamiento no-lineal ...
  • Magnetical response and mechanical properties of second generation of HTSC, YBCO materials 

    Roa Rovira, Joan Josep; Dias, F.T.; Segarra, M. (InTech — Open Access Company, 2012-05-15)
    Part of book or chapter of book
    Open Access
  • Microstructura y propiedades mecánicas del material masivo superconductor YBCO a 300 y 77 K 

    Konstantopoulou, Konstantina; PASTOR, J.Y.; Roa Rovira, Joan Josep; Segarra Rubi, Merce (2012)
    Conference lecture
    Open Access
    En este trabajo se realiza una caracterización mecánica y microestructural del material masivo superconductor YBCO. El material ha sido procesado mediante dos técnicas distintas, Top -Seeding Melt Growth (TSMG)y Bridgman, ...
  • Nanoindentation of Bridgman YBCO samples 

    Roa Rovira, Joan Josep; Konstantopoulou, Dimitra; Jiménez Piqué, Emilio; Martín, V.; Segarra, M.; Pastor, J.Y. (2012-04)
    Article
    Restricted access - publisher's policy
    n this study, the mechanical properties of YBa2Cu3O7−x, obtained by the Bridgman technique, were examined using a Berkovich tip indenter on the basal plane (0 0 1). Intrinsic hardness was measured by nanoindentation tests ...
  • Obtención de monodominios de YBCO mediante el proceso TSMG 

    Padilla Sánchez, José Antonio (Universitat Politècnica de Catalunya, 2015-11)
    Master thesis (pre-Bologna period)
    Open Access
    Los materiales cerámicos superconductores de alta temperatura (High Temperature Superconductors, HTS) son capaces de transportar densidades electrónicas (Jc) del orden de 106 A/cm2 y ser capaces de generar campos magnéticos ...
  • Paramagnetic meissner effect and strong time dependence at high fields in melt-textured high-Tc superconductors 

    Gouvêa, C.P.; Dias, Fabio Teixeira; Vieira, V.N.; da Silva, Douglas Langie; Schaf, Jacob; Wolff-Fabris, F.; Roa Rovira, Joan Josep (2013-05)
    Article
    Open Access
    In this work we report on systematic field-cooled magnetization experiments in melt-textured YBa 2 Cu 3 O 7 − δ samples containing Y211 precipitates. Magnetic fields up to 14 T were applied either parallel or ...
  • Pilas de combustible de una sola cámara, basadas en electrolitos de ceria dopada con gadolinia y operadas con metano y propano 

    Morales, Miguel; Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M.; Piñol, S. (2010-04-20)
    Article
    Open Access
    La principal ventaja de las pilas de combustible de óxido sólido (SOFCs) de una sola cámara, frente a las bicamerales convencionales, es que permiten simplificar el diseño del dispositivo y operar con mezclas de hidrocarburos ...
  • Preparación de sinterizados para deposición de capas superconductoras de alta temperatura 

    de Arriba Bodelón, Sara (Universitat Politècnica de Catalunya, 2013-11)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    100 años después del descubrimiento de la superconductividad por el físico holandés Heike Kamerlingh Onnes, los superconductores ya se usan en múltiples aplicaciones y se prevé que jueguen un papel fundamental en las ...
  • Simulation of high temperature superconductors and experimental validation 

    Olm Serra, Marc; Badia, Santiago; Martín Huertas, Alberto Francisco (2019-04)
    Article
    Restricted access - publisher's policy
    In this work, we present a parallel, fully-distributed finite element numerical framework to simulate the low-frequency electromagnetic behaviour of superconducting devices, which efficiently exploits high performance ...
  • Síntesi i caracterització de partícules nanomètriques de Y2BaCuO5 

    Masdeu Mayans, Francesc (Universitat Politècnica de Catalunya, 2006-12)
    Master thesis (pre-Bologna period)
    Open Access
  • Superconductors 

    Granados, Xavier (ICMAB-CSIC); Serrano Gutiérrez, Jorge (2009-03-30)
    Audiovisual
    Open Access
    En aquest vídeo s'explica el fenomen de la superconductivitat a altes temperatures i es presenta una pràctica demostrativa d'un tren levitant degut al refredament d'una pastilla superconductora per sota de la temperatura ...