期刊
PHILOSOPHICAL MAGAZINE
卷 93, 期 6, 页码 673-680出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2012.724185
关键词
superconducting materials; rare earth compounds; electrical resistivity; specific heat
类别
资金
- US Air Force Office of Scientific Research - Multidisciplinary University Research Initiative [FA9550-09-1-0603]
- US Department of Energy [DE-FG02-04-ER46105]
Polycrystalline samples of F-substituted LnOBiS(2) (Ln=La, Ce, Pr, Nd, Yb) compounds were synthesized by solid-state reaction. The samples were characterized by X-ray diffraction measurements and found to have the ZrCuSiAs crystal structure. Electrical resistivity and magnetic susceptibility measurements were performed on all of the samples and specific heat measurements were made on those with Ln=La, Ce, and Yb. All of these compounds exhibit superconductivity in the range 1.9K-5.4K, which has not previously been reported for the compounds based on Ce, Pr, and Yb. The YbO0.5F0.5BiS2 compound was also found to exhibit magnetic order at approximate to 2.7K that apparently coexists with superconductivity below 5.4K.
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