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dc.contributor.author
Eisterer, Michael
dc.contributor.author
Mishev, Valentin
dc.contributor.author
Zehetmayer, Martin
dc.contributor.author
Zhigadlo, N.
dc.contributor.author
Katrych, Sergiy O.
dc.contributor.author
Karpiński, Janusz
dc.date.accessioned
2019-12-06T14:41:07Z
dc.date.available
2017-06-11T07:42:56Z
dc.date.available
2019-12-06T14:41:07Z
dc.date.issued
2014-04
dc.identifier.issn
0953-2048
dc.identifier.issn
1361-6668
dc.identifier.other
10.1088/0953-2048/27/4/044009
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/83365
dc.identifier.doi
10.3929/ethz-b-000083365
dc.description.abstract
We report on angle-resolved magnetization measurements on NdFeAsO0.65F0.35 (Nd-1111) single crystals. The field dependence of the critical current density, Jc, is non-monotonic in these crystals at all orientations and temperatures due to the fishtail effect, which strongly influences the angular dependence of Jc. The currents decrease as the field is tilted from the crystallographic c-axis at low fields, but increase at high fields. A peak occurs in the angular dependence of Jc at intermediate fields. The critical currents are significantly enhanced after irradiation with fast neutrons and the fishtail disappears. The different current anisotropies at low and high fields, however, persist. We discuss the data in the framework of the anisotropic scaling approach and propose a transition from dominant pinning by large defects of low density at low fields to pinning by small defects of high density at high fields in the pristine crystal. Strong pinning dominates at all fields after the irradiation, and the angular dependence of Jc can be described via anisotropic scaling only after an appropriate extension to this pinning regime.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Institute of Physics
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.subject
flux pinning
en_US
dc.subject
anisotropy
en_US
dc.subject
critical currents
en_US
dc.subject
iron based superconductors
en_US
dc.subject
fishtail effect
en_US
dc.title
Critical current anisotropy in Nd-1111 single crystals and the influence of neutron irradiation
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2014-03-18
ethz.journal.title
Superconductor Science & Technology
ethz.journal.volume
27
en_US
ethz.journal.issue
4
en_US
ethz.pages.start
044009
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
000478250
ethz.publication.place
Bristol
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich, direkt::00012 - Lehre und Forschung, direkt::00007 - Departemente, direkt::02010 - Departement Physik / Department of Physics::02505 - Laboratorium für Festkörperphysik (LFP) / Laboratory for Solid State Physics (LFP)::03569 - Batlogg, Bertram (emeritus)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich, direkt::00012 - Lehre und Forschung, direkt::00007 - Departemente, direkt::02010 - Departement Physik / Department of Physics::02505 - Laboratorium für Festkörperphysik (LFP) / Laboratory for Solid State Physics (LFP)::03569 - Batlogg, Bertram (emeritus)
ethz.date.deposited
2017-06-11T07:47:54Z
ethz.source
ECIT
ethz.identifier.importid
imp593651d6a2eb689002
ethz.ecitpid
pub:131547
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T19:10:13Z
ethz.rosetta.lastUpdated
2019-12-06T14:41:20Z
ethz.rosetta.versionExported
true
ethz.COinS
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