The critical current density of iron-based superconductors under magnetic field

The time-dependent Ginzburg–Landau Lawrence–Doniach model with thermal fluctuations is used to investigate the critical current density. We calculate the critical current as a function of magnetic field and temperature in the homogeneous phase. The theoretical result based on the self-consistent Gau...

Full description

Saved in:
Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2022-10, Vol.95 (10), Article 177
Main Authors: Dang, Hue Thi Minh, Tinh, Bui Duc
Format: Article
Language:English
Subjects:
Analysis
Complex Systems
Condensed Matter Physics
Critical current density
Fluid- and Aerodynamics
Iron
Magnetic fields
Physics
Physics and Astronomy
Regular Article - Solid State and Materials
Solid State Physics
Specific gravity
Superconductivity
Superconductors
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The time-dependent Ginzburg–Landau Lawrence–Doniach model with thermal fluctuations is used to investigate the critical current density. We calculate the critical current as a function of magnetic field and temperature in the homogeneous phase. The theoretical result based on the self-consistent Gaussian approximation is used to fit the measurement data of iron-based superconductors FeSe 0.5 Te 0.5 . Our results show good agreement with experimental data for temperatures at 4.2 and 12 K. We also plot several theoretical curves about the critical current density for temperatures below and above T c . It shows that the critical current density is still non-zero and considerably large for temperature above T c , indicating the residual superconductivity above T c due to strong thermal fluctuations. Graphical abstract
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/s10051-022-00441-7