Superconductivity in SmFe1-xMxAsO (M = Co, Rh, Ir)

Details Superconductivity in SmFe1-xMxAsO (M = Co, Rh, Ir) Superconductivity in SmFe1-xMxAsO (M = Co, Rh, Ir)

2009-06-10

arxiv.org/abs/0906.1898v1

EPL, 89 (2010) 67007

Physics

Condensed Matter

Superconductivity

16 pages, 4 figures, 1 table

Scientific paper

10.1209/0295-5075/89/67007

In this paper we report the comparative study of superconductivity by 3d (Co), 4d (Rh), 5d (Ir) element doping in SmFeAsO. X-ray diffraction patterns indicate that the material has formed the ZrCuSiAs-type structure with a space group P4/nmm. It is found that the antiferromagnetic spin-density-wave (SDW) order in the parent compounds is rapidly suppressed by Co, Rh, and Ir doping, and superconductivity emerges. Both electrical resistance and magnetization measurements show superconductivity up to around 10 K in SmFe1-xMxAsO (M = Co, Rh, Ir). Co, Rh and Ir locate in the same column in the periodic table of elements but have different electronic band structure, so comparative study would add more ingredients to the underlying physics of the iron-based superconductors.

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