A route for a strong increase of critical current in nanostrained iron-based superconductors

Toshinori Ozaki (), Lijun Wu, Cheng Zhang, Jan Jaroszynski, Weidong Si, Juan Zhou, Yimei Zhu and Qiang Li ()
Additional contact information
Toshinori Ozaki: Brookhaven National Laboratory
Lijun Wu: Brookhaven National Laboratory
Cheng Zhang: Brookhaven National Laboratory
Jan Jaroszynski: National High Magnetic Field Laboratory, Florida State University
Weidong Si: Brookhaven National Laboratory
Juan Zhou: Brookhaven National Laboratory
Yimei Zhu: Brookhaven National Laboratory
Qiang Li: Brookhaven National Laboratory

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract The critical temperature Tc and the critical current density Jc determine the limits to large-scale superconductor applications. Superconductivity emerges at Tc. The practical current-carrying capability, measured by Jc, is the ability of defects in superconductors to pin the magnetic vortices, and that may reduce Tc. Simultaneous increase of Tc and Jc in superconductors is desirable but very difficult to realize. Here we demonstrate a route to raise both Tc and Jc together in iron-based superconductors. By using low-energy proton irradiation, we create cascade defects in FeSe0.5Te0.5 films. Tc is enhanced due to the nanoscale compressive strain and proximity effect, whereas Jc is doubled under zero field at 4.2 K through strong vortex pinning by the cascade defects and surrounding nanoscale strain. At 12 K and above 15 T, one order of magnitude of Jc enhancement is achieved in both parallel and perpendicular magnetic fields to the film surface.

Date: 2016
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms13036 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13036

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms13036

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().