期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 21, 期 26, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/26/265701
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Superconductivity is found in 50% K-doped EuFe2As2 samples below 33 K. Our results from electrical resistivity, magnetic susceptibility and Fe-57 and Eu-151 Mossbauer spectroscopy provide clear evidence that the ordering of the Fe moments observed at 190 K in undoped EuFe2As2 is completely suppressed in our 50% K-doped sample; thus there is no coexistence of the Fe magnetic order and the superconducting state. However, short range ordering of the Eu moments coexists with the superconducting state below 15 K. A bump in the susceptibility well below T-c as well as the broadening of the Fe Mossbauer line below 27 K evidence an interplay between the Eu magnetism and the superconducting state.
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