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dc.contributor.authorGurevich, A.en_US
dc.contributor.authorPatnaik, S.en_US
dc.contributor.authorBraccini, V.en_US
dc.contributor.authorKim, K. H.en_US
dc.contributor.authorMielke, C.en_US
dc.contributor.authorSong, X.en_US
dc.contributor.authorCooley, L. D.en_US
dc.contributor.authorBu, S. D.en_US
dc.contributor.authorKim, D. M.en_US
dc.contributor.authorChoi, J. -H.en_US
dc.contributor.authorBelenky, L. J.en_US
dc.contributor.authorGiencke, J.en_US
dc.contributor.authorLee, M. K.en_US
dc.contributor.authorTian, W.en_US
dc.contributor.authorPan, X. Q.en_US
dc.contributor.authorSiri, A.en_US
dc.contributor.authorHellstrom, E. E.en_US
dc.contributor.authorEom, C. B.en_US
dc.contributor.authorLarbalestier, D. C.en_US
dc.date.accessioned2006-12-19T19:05:32Z
dc.date.available2006-12-19T19:05:32Z
dc.date.issued2004-02-01en_US
dc.identifier.citationGurevich, A; Patnaik, S; Braccini, V; Kim, K H; Mielke, C; Song, X; Cooley, L D; Bu, S D; Kim, D M; Choi, J H; Belenky, L J; Giencke, J; Lee, M K; Tian, W; Pan, X Q; Siri, A; Hellstrom, E E; Eom, C B; Larbalestier, D C (2004). "Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering." Superconductor Science and Technology. 17(2): 278-286. <http://hdl.handle.net/2027.42/48993>en_US
dc.identifier.issn0953-2048en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/48993
dc.description.abstractWe report a significant enhancement of the upper critical field Hc2 of different MgB2 samples alloyed with nonmagnetic impurities. By studying films and bulk polycrystals with different resistivities ρ, we show a clear trend of an increase in Hc2 as ρ increases. One particular high resistivity film had a zero-temperature Hc2(0) well above the Hc2 values of competing non-cuprate superconductors such as Nb3Sn and Nb–Ti. Our high-field transport measurements give record values  T and  T for high resistivity films and  T for untextured bulk polycrystals. The highest Hc2 film also exhibits a significant upward curvature of Hc2(T) and a temperature dependence of the anisotropy parameter opposite to that of single crystals: γ(T)  decreases as the temperature decreases, from to . This remarkable Hc2 enhancement and its anomalous temperature dependence are a consequence of the two-gap superconductivity in MgB2, which offers special opportunities for further Hc2 increases by tuning of the impurity scattering by selective alloying on Mg and B sites. Our experimental results can be explained by a theory of two-gap superconductivity in the dirty limit. The very high values of Hc2(T) observed suggest that MgB2 can be made into a versatile, competitive high-field superconductor.en_US
dc.format.extent3118 bytes
dc.format.extent349198 bytes
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherIOP Publishing Ltden_US
dc.titleVery high upper critical fields in MgB2 produced by selective tuning of impurity scatteringen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USAen_US
dc.contributor.affiliationumDepartment of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA ;en_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA ; Department of Physics, University of Genova, INFM-LAMIA, Via Dodecaneso 33, 16146 Genova, Italyen_US
dc.contributor.affiliationotherNational High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USAen_US
dc.contributor.affiliationotherNational High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA ;en_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherDepartment of Physics, University of Genova, INFM-LAMIA, Via Dodecaneso 33, 16146 Genova, Italyen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationotherApplied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USAen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/48993/2/sust4_2_008.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1088/0953-2048/17/2/008en_US
dc.identifier.sourceSuperconductor Science and Technology.en_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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