Measurements of the superconducting fluctuations in optimally doped BaFe2−xNixAs2 under high magnetic fields: probing the 3D-anisotropic Ginzburg-Landau approach

The superconducting fluctuations well inside the normal state of Fe-based superconductors were experimentally studied through the in-plane paraconductivity in several high-quality, optimally doped BaFe2−xNixAs2 crystals. These measurements were performed in magnetic fields with amplitudes up to 14 T...

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Bibliographic Details
Published in:Superconductor science & technology 2014-07, Vol.27 (7)
Main Authors: Rey, R I, Ramos-Álvarez, A, Carballeira, C, Mosqueira, J, Vidal, F, Salem-Sugui, S, Alvarenga, A D, Zhang, Rui, Luo, Huiqian
Format: Article
Language:English
Subjects:
Fe-based superconductors
superconducting fluctuations
transport properties
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Summary:The superconducting fluctuations well inside the normal state of Fe-based superconductors were experimentally studied through the in-plane paraconductivity in several high-quality, optimally doped BaFe2−xNixAs2 crystals. These measurements were performed in magnetic fields with amplitudes up to 14 T, and different orientations relative to the c-axis of the crystals ( , 53 , and 90 ). The results allowed a stringent check of the applicability of a recently proposed Ginzburg-Landau approach for the fluctuating electrical conductivity of three-dimensional (3D) anisotropic materials in the presence of finite applied magnetic fields.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/27/7/075001