Three-Dimensional Anisotropic Fluctuation Diamagnetism Around the Superconducting Transition of Ba1-xKxFe2As2 Single Crystals in the Finite-Field (or Prange) Regime

被引：5
|
作者：
Mosqueira, J. [1 ]
Dancausa, J. D. [1 ]
Carballeira, C. [1 ]
Salem-Sugui, S., Jr. [2 ]
Alvarenga, A. D. [3 ]
Luo, H. -Q. [4 ]
Wang, Z. -S. [4 ]
Wen, H. -H. [4 ,5 ,6 ]
Vidal, F. [1 ]
机构：
[1] Univ Santiago Compostela, LBTS, Santiago De Compostela 15782, Spain
[2] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ, Brazil
[3] Inst Nacl Metrol Qualidade & Tecnol, BR-25250020 Duque De Caxias, RJ, Brazil
[4] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
[5] Nanjing Univ, Ctr Superconducting Phys & Mat, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[6] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2013年 / 26卷 / 04期
关键词：
Iron-based superconductors; Magnetic properties; Fluctuations; Anisotropy; HIGH-TEMPERATURE SUPERCONDUCTIVITY; MAGNETIC-FIELD; STATE; SUSCEPTIBILITY; WELL;
D O I：
10.1007/s10948-012-1862-0
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetization around the superconducting transition was recently measured in a high-quality Ba1-x K (x) Fe2As2 single crystal with magnetic fields applied along and transverse to the crystal Fe-layers [J. Mosqueira et al. in Phys. Rev. B 83:094519, 2011]. Here we extend this study to the finite-field (or Prange) regime, in which the magnetic susceptibility is expected to be strongly dependent on the applied magnetic field. These measurements are analyzed in the framework of the three-dimensional anisotropic Ginzburg-Landau (3D-aGL) approach generalized to the short-wavelength regime through the introduction of a total-energy cutoff in the fluctuation spectrum. The results further confirm the adequacy of GL approaches to describe the fluctuation effects close to the superconducting transition of these materials.
引用
收藏
页码：1217 / 1220
页数：4
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