Magnetic relaxation in (Bi, Pb)-2223 superconducting ceramics doped with α-Al_(2)O_(3) nanoparticles

• M. Hernández-Wolpez ^[1] ; L. C. Gutiérrez-Rivero ^[1] ; I. García-Fornaris ^[2] ; E. Govea-Alcaide ^[3] ; F. Abud ^[4] ; R. F. Jardim ^[4] ; P. Muné ^[5]
  1. [1] Universidad de Camagüey

     Universidad de Camagüey

     Cuba

     
  2. [2] Universidad De Granma

     Universidad De Granma

     Cuba

     
  3. [3] Universidade Federal do Amazonas

     Universidade Federal do Amazonas

     Brasil

     
  4. [4] Universidade de São Paulo

     Universidade de São Paulo

     Brasil

     
  5. [5] Universidad de Oriente - Santiago de Cuba

     Universidad de Oriente - Santiago de Cuba

     Cuba

     

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• Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 66, Nº. 1, 2020, págs. 42-46
• Idioma: inglés
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• Resumen

  • A preliminary study of the magnetic relaxation in (Bi, Pb)-2223 superconducting ceramics doped with α-Al_(2)O_(3) nanoparticles is presented, taking as starting point the measurements of the M(t) dependence, both in samples in the form of powder as in pellet. The relaxation of the three types of vortices that can exist inside these materials is analyzed, emphasizing on the intragranular region where the planar defects exist and, consequently, Abrikosov-Josephson vortices emerge. Finally, interesting results of the comparison between the behavior of the samples in the form of powder and in the form of pellet are shown from the estimation of the pinning energy of the vortices.