TITLE

Enhancement in transition temperature and upper critical field of CeO0.8F0.2FeAs by yttrium doping

AUTHOR(S)
Prakash, J.; Singh, S. J.; Banerjee, A.; Patnaik, S.; Ganguli, A. K.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p262507
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report significant enhancement in superconducting properties of yttrium substituted Ce1-xYxOFFeAs superconductors. The polycrystalline samples were prepared by two step solid state reaction technique. X-ray diffraction confirmed tetragonal ZrCuSiAs structure with decrease in both a and c lattice parameters on increasing yttrium substitution (with fixed F content). With smaller ion Y in place of Ce, the transition temperature increased by 6 K. Yttrium doping also lead to higher critical fields as well as broader magnetization loops, particularly at elevated temperature.
ACCESSION #
47244449

 

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