NDLI: Influence on the Tc of Co and F Co-doping into SmFeAsO at Fe and O Site

Content Provider	Springer Nature Link
Author	Yang, Zhongtian Zhu, Liya
Copyright Year	2014
Abstract	Series of superconductive samples in which Co and F co-doping into SmFeAsO were prepared by mechanical alloying (MA) and sequent sintering method to investigate the influence on Tc of the charge carrier introduced into SmO layers and FeAs layers simultaneously. For the SmFe$_{1 −}$ xCo$_{ x }$AsO with optimum Co doping content of x= 0.1, F doping can still enhance the Tc until up to 23 K when doping content is 15 % (from our previous works, the highest Tc of SmFe$_{1 −}$ xCo$_{ x }$AsO is 12.5 K). The charge carrier density of SmFe$_{0.9}$Co$_{0.1}$AsO$_{0.85}$ F $_{0.15}$ is larger than that of SmFe$_{0.9}$Co$_{0.1}$AsO, characterized by Hall coefficient measurement. On the other hand, for optimum F-doping SmFeAsO$_{0.8}$ F $_{0.2}$, simultaneous Co doping decreases the Tc dramatically. For the under-doping SmFeAsO$_{0.9}$ F $_{0.1}$, the Tc rises with the increasing Co doping content to 10 % and then falls down with more Co doping into the compounds. The results can offer some experimental evidence of the competition and restriction among the factors influencing the Tc of the SmFeAsO by doping Co and F simultaneously.
Starting Page	2035
Ending Page	2039
Page Count	5
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	27
Issue Number	9
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2014-06-04
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Co-doping Influence on Tc Competition and Restriction Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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