Journal
PHYSICAL REVIEW B
Volume 79, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.184516
Keywords
annealing; arsenic alloys; doping; iron alloys; sodium alloys; stoichiometry; superconducting materials; superconducting transitions
Funding
- T. L. L. Temple Foundation
- John J. and Rebecca Moores Endowment
- State of Texas through the Texas Center for Superconductivity
- U.S. Air Force Office of Scientific Research
- Lawrence Berkeley Laboratory
- Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering of the U.S. Department of Energy [DE-AC03-76SF00098]
- NSF [CHE-0616805]
- Robert A. Welch Foundation
Ask authors/readers for more resources
Superconductivity and phase relationships were explored in the Na-Fe-As system. The PbFCl-type 111 phase is stable only within a Na stoichiometry range of 1.00 to similar to 0.85, and exhibits bulk superconductivity within an even narrower range around 0.90 in Na0.9FeAs. In particular, stoichiometric NaFeAs is not a bulk superconductor. The onset of the superconducting transition varies in a totally different way and the highest T-c occurs in multiphase samples with a nominal composition of Na:Fe:As=0.5:1:1, where the superconductive volume-fraction is almost zero. Such doping dependency is rather surprising and in disagreement with most expectations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
