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High-field paramagnetic Meissner effect up to 14 T in melt-textured YBa2Cu3O7-delta

Author

Teixeira Dias, Fábio

Vieira, Valdemar das Neves

Wolff-Fabris, Frederik

Kampert, Erik

Paiva Gouvêa, Cristol de

Campos, A.P.C.

Archanjo, B.S.

Schaf, Jacob

Obradors Berenguer, Xavier

Puig, T.

Roa Rovira, Joan Josep

Sahoo, B.K.

Other authors

Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica

Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials

Publication date

2016-06-01

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Abstract

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)

Document Type

Article

Language

English

Subjects and keywords

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

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http://www.sciencedirect.com/science/article/pii/S0921453416300107

info:eu-repo/grantAgreement/EC/FP7/228043/EU/A coordinated approach to access, experimental development and scientific exploitation of all European large infrastructures for high magnetic fields/EUROMAGNET II

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Rights

http://creativecommons.org/licenses/by-nc-nd/3.0/es/

Open Access

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E-prints [72987]