Observation of anisotropic diamagnetism above the superconducting transition in iron pnictide Ba1-xKxFe2As2 single crystals due to thermodynamic fluctuations

被引：28
|
作者：
Mosqueira, J. [1 ]
Dancausa, J. D. [1 ]
Vidal, F. [1 ]
Salem-Sugui, S., Jr. [2 ]
Alvarenga, A. D. [3 ]
Luo, H. -Q. [4 ,5 ]
Wang, Z. -S. [4 ,5 ]
Wen, H. -H. [4 ,5 ]
机构：
[1] Univ Santiago de Compostela, Fac Fis, LBTS, E-15782 Santiago De Compostela, Spain
[2] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil
[3] Inst Nacl Metrol Normalizacao & Qualidade Ind, BR-25250020 Duque De Caxias, RJ, Brazil
[4] Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China
[5] Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 09期
关键词：
HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-FIELD; II SUPERCONDUCTORS; TC; STATE; WELL;
D O I：
10.1103/PhysRevB.83.094519
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-resolution magnetization measurements performed in a high-quality Ba1-xKxFe2As2 single crystal allowed to determine the diamagnetism induced above the superconducting transition by thermally activated Cooper pairs. These data, obtained with magnetic fields applied along and transverse to the crystal ab layers, demonstrate experimentally that the superconducting transition of iron pnictides may be explained at a phenomenological level in terms of the Gaussian Ginzburg-Landau approach for three-dimensional anisotropic superconductors.
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页数：5
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