Superconductivity at 56 K in samarium-doped SrFeAsF

2009/03/09 by Gang Wu, Y. L. Xie, Huanhuan CHEN +9 · 158 citations
Materials Science · Chemistry · #Iron-based superconductors research #Samarium #Superconductivity #Arsenide #Electrical resistivity and conductivity #Alkaline earth metal #Doping #Condensed matter physics #Rare earth #Metal #Materials science #Strontium #Anomaly (physics) #Magnetic susceptibility #Crystallography #Chemistry #Inorganic chemistry #Physics #Metallurgy #Gallium arsenide

paper · pdf · doi:10.1088/0953-8984/21/14/142203

published in Journal of Physics Condensed Matter 21(14), 142203 (IOP Publishing)

openalex publication_date 2009/03/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08

Abstract

We synthesized the samples Sr(1-x)Sm(x)FFeAs with a ZrCuSiAs-type structure. These samples were characterized by resistivity and susceptibility. It is found that substitution of rare earth metal for alkaline earth metal in this system suppresses the anomaly in resistivity and induces superconductivity. Superconductivity at 56 K in nominal composition Sr(0.5)Sm(0.5)FFeAs is realized, indicating that the superconducting transition temperatures in the iron arsenide fluorides can reach as high as that in oxypnictides with the same structure.

Citations

• Crystal structure and phase transitions across the metal-superconductor boundary in theSmFeAsO1−xFx(0≤x≤0.20)family
• Superconductivity at 43 K in SmFeAsO1-xF x
• SrFeAsF as a parent compound for iron pnictide superconductors
• Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K
• Synthesis, crystal structure and spin-density-wave anomaly of the iron arsenide-fluoride SrFeAsF
• Superconductivity in the iron-based F-doped layered quaternary compound Nd[O 1 − x F x ]FeAs
• Thorium-doping–induced superconductivity up to 56 K in Gd 1−x Th x FeAsO

Cited by

• Correlation effects in the electronic structure of the Ni-based superconducting KNi<mml:mrow/>2S<mml:mrow/>2
• High-temperature superconductivity [wikipedia]