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Vortex fluctuation effect evaluated using reversible magnetization in optimally doped single crystal NaFe0.97Co0.03As superconductor

Title
Vortex fluctuation effect evaluated using reversible magnetization in optimally doped single crystal NaFe0.97Co0.03As superconductor
Authors
Ahmad, D.Min, B. H.Choi, W. J.Salem-Sugui, S., Jr.Mosqueira, J.Kwon, Yong Seung
DGIST Authors
Kwon, Yong Seung
Issue Date
2014-12
Citation
Superconductor Science and Technology, 27(12)
Type
Article
Article Type
Article
Keywords
Applied Magnetic FieldsCobaltFluctuation EffectsHigh Temperature SuperconductorsIron-Based SuperconductorIron-Based SuperconductorsIrreversibility LinesMagnetic FieldsMagnetic PropertiesMagnetizationReversible MagnetizationSingle CrystalsSuperconducting Transition TemperatureTemperature DependenceTemperature DistributionUniversal ScalingVortex FlowVortex Fluctuations
ISSN
0953-2048
Abstract
The reversible magnetization curves for various magnetic fields are investigated for a single crystal of the optimally doped NaFe0.97Co0.03As superconductor with the superconducting transition temperature Tc=20.9 K (ρ(T)=0) in the case where H is parallel to c-axis. A well-formed rounding effect is observed in the temperature dependence of the magnetization, and it widens on increasing the strength of the applied magnetic fields. At 20.2 K, we observe a crossing of the M(T) curves for different applied magnetic fields, indicating important fluctuation effects. The irreversibility line Hirr(T) obeys a universal scaling relation Hirr(T)=H0(1-T/Tc)ncharacterized by n∼1.537, which confirms the moderately anisotropic nature of the sample. The scaling analysis of the reversible magnetization in the region near Tc(H) supports the three-dimensional nature of the vortex fluctuations in NaFe0.97Co0.03As. © 2014 IOP Publishing Ltd.
URI
http://hdl.handle.net/20.500.11750/5234
DOI
10.1088/0953-2048/27/12/125006
Publisher
Institute of Physics Publishing
Related Researcher
  • Author Kwon, Yong Seung Quantum Functional Materials Laboratory
  • Research Interests High Tc Superconductors and magnetic materials; Thermoelectric Materials
Files:
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Collection:
Emerging Materials ScienceQuantum Functional Materials Laboratory1. Journal Articles


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