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

页码：1217 / 1220

页数：4

共 40 条

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PHYSICAL REVIEW B, 2014, 89 (02):
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