High-field paramagnetic Meissner effect up to 14 T in melt-textured YBa 2 Cu 3 O 7 –δ
| Autor: | B. K. Sahoo, Cristol de Paiva Gouvêa, Fábio Teixeira Dias, V. N. Vieira, Erik Kampert, Teresa Puig, Joan Josep Roa, A.P.C. Campos, Frederik Wolff-Fabris, Xavier Obradors, Jacob Schaf, B. S. Archanjo |
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| Přispěvatelé: | Ministério da Ciência, Tecnologia e Inovação (Brasil), Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), European Commission, 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, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Flux pinning
Magnetism microstructure Energy Engineering and Power Technology 02 engineering and technology Magnetic flux compression system 01 natural sciences Magnetization josephson-junction arrays yba2cu3o7-y2bacuo5 composites Paramagnetism Condensed Matter::Superconductivity 0103 physical sciences Paramagnetic Meissner effect time-dependence Electrical and Electronic Engineering enhanced critical currents 010306 general physics Magnetització Physics single-crystals Condensed matter physics Física [Àrees temàtiques de la UPC] ac magnetic-susceptibility Relaxation (NMR) 021001 nanoscience & nanotechnology Condensed Matter Physics high-temperature superconductors Magnetic flux 3. Good health Electronic Optical and Magnetic Materials Magnetic anisotropy Meissner effect nb 0210 nano-technology Vortex pinning Magnetic relaxation |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya |
| Popis: | Dias, Fábio Teixeira et al. We have performed magnetization experiments in a melt-textured YBa 2 Cu 3 O 7- δ(Y123) sample with Y 2 BaCuO 5 (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 Para- magnetic 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 sce- nario 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. This work was financed by the Brazilian MCTI/CNPq Univer- sal 14/2012 (contract number 477506/2012-7 ). The experimental work at the HLD was supported by Euromagnet II (contract num- ber 228043 ). |
| Databáze: | OpenAIRE |
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