Doubling the critical current density in superconducting FeSe0.5Te0.5 thin films by low temperature oxygen annealing
Abstract
Iron chalcogenide superconducting thin films and coated conductors are attractive for potential high field applications at liquid helium temperature for their high critical current densities Jc, low anisotropies, and relatively strong grain couplings. Embedding flux pinning defects is a general approach to increase the in-field performance of superconductors. However, many effective pinning defects can adversely affect the zero field or self-field Jc, particularly in cuprate high temperature superconductors. Here, we report the doubling of the self-field Jc in FeSe0.5Te0.5 films by low temperature oxygen annealing, reaching ~3 MA/cm2. In-field performance is also dramatically enhanced. In conclusion, our results demonstrate that low temperature oxygen annealing is a simple and cost-efficient post-treatment technique which can greatly help to accelerate the potential high field applications of the iron-based superconductors.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering Dept.
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1342634
- Report Number(s):
- BNL-113428-2017-JA
Journal ID: ISSN 0003-6951; R&D Project: MA012MABA; KC0202050; TRN: US1701254
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 109; Journal Issue: 20; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
Citation Formats
Zhang, Cheng, Si, Weidong, and Li, Qiang. Doubling the critical current density in superconducting FeSe0.5Te0.5 thin films by low temperature oxygen annealing. United States: N. p., 2016.
Web. doi:10.1063/1.4967879.
Zhang, Cheng, Si, Weidong, & Li, Qiang. Doubling the critical current density in superconducting FeSe0.5Te0.5 thin films by low temperature oxygen annealing. United States. https://doi.org/10.1063/1.4967879
Zhang, Cheng, Si, Weidong, and Li, Qiang. Mon .
"Doubling the critical current density in superconducting FeSe0.5Te0.5 thin films by low temperature oxygen annealing". United States. https://doi.org/10.1063/1.4967879. https://www.osti.gov/servlets/purl/1342634.
@article{osti_1342634,
title = {Doubling the critical current density in superconducting FeSe0.5Te0.5 thin films by low temperature oxygen annealing},
author = {Zhang, Cheng and Si, Weidong and Li, Qiang},
abstractNote = {Iron chalcogenide superconducting thin films and coated conductors are attractive for potential high field applications at liquid helium temperature for their high critical current densities Jc, low anisotropies, and relatively strong grain couplings. Embedding flux pinning defects is a general approach to increase the in-field performance of superconductors. However, many effective pinning defects can adversely affect the zero field or self-field Jc, particularly in cuprate high temperature superconductors. Here, we report the doubling of the self-field Jc in FeSe0.5Te0.5 films by low temperature oxygen annealing, reaching ~3 MA/cm2. In-field performance is also dramatically enhanced. In conclusion, our results demonstrate that low temperature oxygen annealing is a simple and cost-efficient post-treatment technique which can greatly help to accelerate the potential high field applications of the iron-based superconductors.},
doi = {10.1063/1.4967879},
journal = {Applied Physics Letters},
number = 20,
volume = 109,
place = {United States},
year = {Mon Nov 14 00:00:00 EST 2016},
month = {Mon Nov 14 00:00:00 EST 2016}
}
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