000075683 001__ 75683 000075683 005__ 20190709135631.0 000075683 0247_ $$2doi$$a10.1088/1361-6668/aa9244 000075683 0248_ $$2sideral$$a104322 000075683 037__ $$aART-2017-104322 000075683 041__ $$aeng 000075683 100__ $$aQureishy, T. 000075683 245__ $$aDendritic flux avalanches in a superconducting MgB2 tape 000075683 260__ $$c2017 000075683 5060_ $$aAccess copy available to the general public$$fUnrestricted 000075683 5203_ $$aTapes of MgB2 with high critical current have a significant technological potential, but can experience operational breakdown due to thermomagnetic instabilities. Such events are routinely registered by magnetisation measurements, but were never observed by direct imaging techniques. Here we report magneto-optical imaging visualisation of a tape with reduced thickness and enhanced critical current density. The spatial structure of the thermomagnetic avalanche events was resolved, and the reproducibility and nucleation thresholds were determined. Avalanches appearing at low fields are small intrusions at the tape edges, while larger fields create more extensive avalanches having dendritic structures similar to those observed in thin-film superconductors. In contrast to dendritic avalanches in thin films, the avalanches in the tapes show reproducibility to a larger extent. 000075683 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T12$$9info:eu-repo/grantAgreement/ES/MINECO/ENE2014-52105-R$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2011-22719 000075683 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000075683 590__ $$a2.861$$b2017 000075683 591__ $$aPHYSICS, CONDENSED MATTER$$b23 / 67 = 0.343$$c2017$$dQ2$$eT2 000075683 591__ $$aPHYSICS, APPLIED$$b41 / 146 = 0.281$$c2017$$dQ2$$eT1 000075683 592__ $$a1.036$$b2017 000075683 593__ $$aCeramics and Composites$$c2017$$dQ1 000075683 593__ $$aCondensed Matter Physics$$c2017$$dQ1 000075683 593__ $$aMetals and Alloys$$c2017$$dQ1 000075683 593__ $$aMaterials Chemistry$$c2017$$dQ1 000075683 593__ $$aElectrical and Electronic Engineering$$c2017$$dQ1 000075683 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000075683 700__ $$0(orcid)0000-0001-9625-5160$$aLaliena, Carlos 000075683 700__ $$0(orcid)0000-0003-4839-5286$$aMartínez, Elena$$uUniversidad de Zaragoza 000075683 700__ $$aQviller, A.J. 000075683 700__ $$aVestgården, J.I. 000075683 700__ $$aJohansen, T.H. 000075683 700__ $$0(orcid)0000-0002-4140-4058$$aNavarro, Rafael$$uUniversidad de Zaragoza 000075683 700__ $$aMikheenko, P. 000075683 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal. 000075683 773__ $$g30, 12 (2017), [7 pp.]$$pSupercond. sci. technol.$$tSUPERCONDUCTOR SCIENCE & TECHNOLOGY$$x0953-2048 000075683 8564_ $$s2905671$$uhttps://zaguan.unizar.es/record/75683/files/texto_completo.pdf$$yPostprint 000075683 8564_ $$s52268$$uhttps://zaguan.unizar.es/record/75683/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000075683 909CO $$ooai:zaguan.unizar.es:75683$$particulos$$pdriver 000075683 951__ $$a2019-07-09-12:33:20 000075683 980__ $$aARTICLE