Upper critical magnetic field in Ba0.68K0.32Fe2As2 and Ba(Fe0.93Co0.07)(2)As-2

dc.contributor.author Gasparov, V. A.
dc.contributor.author Drigo, L.
dc.contributor.author Audouard, A.
dc.contributor.author Canfield, Paul
dc.contributor.author Sun, D. L.
dc.contributor.author Lin, C. T.
dc.contributor.author Bud’ko, Sergey
dc.contributor.author Canfield, Paul
dc.contributor.author Wolff-Fabris, F.
dc.contributor.author Wosnitza, J.
dc.contributor.department Ames Laboratory
dc.contributor.department Physics and Astronomy
dc.date 2020-04-16T05:49:26.000
dc.date.accessioned 2020-06-30T06:21:24Z
dc.date.available 2020-06-30T06:21:24Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 2011
dc.date.issued 2011-08-03
dc.description.abstract <p>We report measurements of the temperature dependence of the radio frequency magnetic penetration depth in Ba0.68K0.32Fe2As2 and Ba(Fe0.93Co0.07)2As2 single crystals in pulsed magnetic fields up to 60 T. From our data, we construct an <em>H</em>-<em>T</em>-phase diagram for the inter-plane (<em>H</em> ‖ <em>c</em>) and in-plane (<em>H</em> ‖ <em>ab</em>) directions for both compounds. For both field orientations in Ba0.68K0.32Fe2As2 we find a concave curvature of the <em>H</em> <em>c</em>2(<em>T</em>) lines with decreasing anisotropy and saturation towards lower temperature. Taking into account Pauli spin paramagnetism we can describe <em>H</em> <em>c</em>2(<em>T</em>) and its anisotropy. In contrast, we find that Pauli paramagnetic pair breaking is not essential for Ba(Fe0.93Co0.07)2As2. For this electron-doped compound, the data support a <em>H</em> <em>c</em>2(<em>T</em>) dependence that can be described by the Werthamer-Helfand-Hohenberg model for <em>H</em> ‖ <em>ab</em> and a two-gap behavior for <em>H</em> ‖ <em>c</em>.</p>
dc.description.comments <p>This is a post-peer-review, pre-copyedit version of an article published in <em>JETP Letters</em>. The final authenticated version is available online at DOI: <a href="https://doi.org/10.1134/S0021364011110038" target="_blank">10.1134/S0021364011110038</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/physastro_pubs/656/
dc.identifier.articleid 1671
dc.identifier.contextkey 17376074
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath physastro_pubs/656
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/57450
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/physastro_pubs/656/2011_CanfieldPaul_UpperCritical.pdf|||Sat Jan 15 01:24:34 UTC 2022
dc.source.uri 10.1134/S0021364011110038
dc.subject.disciplines Condensed Matter Physics
dc.subject.keywords JETP Letter
dc.subject.keywords Pulse Magnetic Field
dc.subject.keywords Critical Magnetic Field
dc.subject.keywords Pair Breaking
dc.subject.keywords ARPES Data
dc.title Upper critical magnetic field in Ba0.68K0.32Fe2As2 and Ba(Fe0.93Co0.07)(2)As-2
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication c5a8128b-7d98-4b8f-92d7-b1385e345713
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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