Superconductivity in SmFeAsO0.8F 0.2 Synthesized by High Pressure High Temperature Treatment
Superconducting SmFeAsO0.8F0.2 compound was successfully synthesized by high pressure high temperature treatment with pressure of 6 G Pa at 1400 °C for 2 hours. The X-ray diffraction pattern of the sample indicates the formation of the tetragonal ZrCuSiAs-type SmFeAsO0.8F0.2 with lattice parameters a=3.932 Å and c=8.490 Å. The electrical transport study shows that the sample has a rather high transition temperature Tc of about 52 K, and magnetic field effect on the resistance reveals a rather high upper critical field HC2 of about 65 T.
Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng
Z. H. Hua et al., "Superconductivity in SmFeAsO0.8F 0.2 Synthesized by High Pressure High Temperature Treatment", Advanced Materials Research, Vols. 197-198, pp. 499-502, 2011