We report for the first time on superconductivity achieved upon hole doping when Ca 2+ is partially substituted with Na + in CaFFeAs. Single crystals of Ca 0.89 Na 0.11 FFeAs up to 2 × 2 mm 2 in size with T c = 34.5 K were grown from NaCl flux. The superconducting transition temperature, with a narrow width ∼2 K, confirmed by both magnetic and resistivity measurements, indicates the high quality of our samples. Magnetic relaxation measurements show that the flux creep in this material is larger than in other iron-based superconductors. The existence of the wide magnetic reversible region and the pronounced flux-creep effect can be attributed to the higher anisotropy of this material.
%0 Journal Article
%1 0953-2048-27-4-044011
%A Shlyk, L
%A Wolff, K K
%A Bischoff, M
%A Rose, E
%A Schleid, Th
%A Niewa, R
%D 2014
%J Superconductor Science and Technology
%K crystals hole-doped
%N 4
%P 044011
%T Crystal structure and superconducting properties of hole-doped Ca0.89 Na0.11FFeAs single crystals
%U http://stacks.iop.org/0953-2048/27/i=4/a=044011
%V 27
%X We report for the first time on superconductivity achieved upon hole doping when Ca 2+ is partially substituted with Na + in CaFFeAs. Single crystals of Ca 0.89 Na 0.11 FFeAs up to 2 × 2 mm 2 in size with T c = 34.5 K were grown from NaCl flux. The superconducting transition temperature, with a narrow width ∼2 K, confirmed by both magnetic and resistivity measurements, indicates the high quality of our samples. Magnetic relaxation measurements show that the flux creep in this material is larger than in other iron-based superconductors. The existence of the wide magnetic reversible region and the pronounced flux-creep effect can be attributed to the higher anisotropy of this material.
@article{0953-2048-27-4-044011,
abstract = {We report for the first time on superconductivity achieved upon hole doping when Ca 2+ is partially substituted with Na + in CaFFeAs. Single crystals of Ca 0.89 Na 0.11 FFeAs up to 2 × 2 mm 2 in size with T c = 34.5 K were grown from NaCl flux. The superconducting transition temperature, with a narrow width ∼2 K, confirmed by both magnetic and resistivity measurements, indicates the high quality of our samples. Magnetic relaxation measurements show that the flux creep in this material is larger than in other iron-based superconductors. The existence of the wide magnetic reversible region and the pronounced flux-creep effect can be attributed to the higher anisotropy of this material.},
added-at = {2018-03-12T14:41:14.000+0100},
author = {Shlyk, L and Wolff, K K and Bischoff, M and Rose, E and Schleid, Th and Niewa, R},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/24b5731497fb800275021e9ae09b98bb6/ulrikeoffenbeck},
interhash = {db16a4552ec36493949777787256685c},
intrahash = {4b5731497fb800275021e9ae09b98bb6},
journal = {Superconductor Science and Technology},
keywords = {crystals hole-doped},
month = mar,
number = 4,
pages = 044011,
timestamp = {2018-03-12T13:41:14.000+0100},
title = {Crystal structure and superconducting properties of hole-doped Ca0.89 Na0.11FFeAs single crystals},
url = {http://stacks.iop.org/0953-2048/27/i=4/a=044011},
volume = 27,
year = 2014
}
