Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering
dc.contributor.author | Gurevich, A. | en_US |
dc.contributor.author | Patnaik, S. | en_US |
dc.contributor.author | Braccini, V. | en_US |
dc.contributor.author | Kim, K. H. | en_US |
dc.contributor.author | Mielke, C. | en_US |
dc.contributor.author | Song, X. | en_US |
dc.contributor.author | Cooley, L. D. | en_US |
dc.contributor.author | Bu, S. D. | en_US |
dc.contributor.author | Kim, D. M. | en_US |
dc.contributor.author | Choi, J. -H. | en_US |
dc.contributor.author | Belenky, L. J. | en_US |
dc.contributor.author | Giencke, J. | en_US |
dc.contributor.author | Lee, M. K. | en_US |
dc.contributor.author | Tian, Wei | en_US |
dc.contributor.author | Pan, Xiaoqing | en_US |
dc.contributor.author | Siri, A. | en_US |
dc.contributor.author | Hellstrom, E. E. | en_US |
dc.contributor.author | Eom, Chang-Beom | en_US |
dc.contributor.author | Larbalestier, D. C. | en_US |
dc.date.accessioned | 2006-12-19T19:05:32Z | |
dc.date.available | 2006-12-19T19:05:32Z | |
dc.date.issued | 2004-02-01 | en_US |
dc.identifier.citation | Gurevich, 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.issn | 0953-2048 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/48993 | |
dc.description.abstract | We 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.extent | 3118 bytes | |
dc.format.extent | 349198 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | IOP Publishing Ltd | en_US |
dc.title | Very high upper critical fields in MgB2 produced by selective tuning of impurity scattering | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA | en_US |
dc.contributor.affiliationum | Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA ; | en_US |
dc.contributor.affiliationother | Applied 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, Italy | en_US |
dc.contributor.affiliationother | National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA | en_US |
dc.contributor.affiliationother | National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA ; | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Department of Physics, University of Genova, INFM-LAMIA, Via Dodecaneso 33, 16146 Genova, Italy | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationother | Applied Superconductivity Center, Department of Materials Science and Engineering, and Department of Physics, University of Wisconsin, Madison, WI 43706, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/48993/2/sust4_2_008.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1088/0953-2048/17/2/008 | en_US |
dc.identifier.source | Superconductor Science and Technology. | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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