2026-04-05T10:39:25Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/973842026-01-27T02:55:50Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Teixeira Dias, Fábio author Vieira, Valdemar das Neves author Wolff-Fabris, Frederik author Kampert, Erik author Paiva Gouvêa, Cristol de author Campos, A.P.C. author Archanjo, B.S. author Schaf, Jacob author Obradors Berenguer, Xavier author Puig, T. author Roa Rovira, Joan Josep author Sahoo, B.K. author 2016-06-01 We have performed magnetization experiments in a melt-textured YBa2Cu3O7-delta(Y123) sample with Y2BaCuO5 (Y211) inclusions, under magnetic fields up to 14 T applied parallel or perpendicular to the ab plane. Magnetic anisotropy and paramagnetic moments were observed in both FC (field-cooling) and FCW (field-cooled warming) procedures and these features correspond to the so-called High-Field Paramagnetic Meissner Effect (HFPME). The HFPME effect increases monotonically as the magnetic field rises and a strong paramagnetic relaxation, toward increasing paramagnetic moment was additionally observed as a function of time. Microscopy analysis revealed a complex and correlated microstructure of the Y211 particles. These correlated defects are well known to cause strong flux pinning. Our results suggest a scenario of strong flux compression within weak or non-superconducting regions of the samples, developed as a consequence of the Meissner effect and assisted by strong flux pinning by the Y211 particles. This scenario is observed up to 14 T and clearly persists beyond. (C) 2016 Elsevier B.V. All rights reserved. Peer Reviewed Postprint (author's final draft) Àrees temàtiques de la UPC::Física Magnetization Paramagnetic Meissner effect Vortex pinning Magnetic relaxation Magnetic flux compression high-temperature superconductors ac magnetic-susceptibility enhanced critical currents josephson-junction arrays yba2cu3o7-y2bacuo5 composites single-crystals time-dependence microstructure system nb Magnetització High-field paramagnetic Meissner effect up to 14 T in melt-textured YBa2Cu3O7-delta