Comparative high-field magnetotransport of the oxypnictide superconductorsRFeAsO1−xFx(R=La, Nd) andSmFeAsO1−δ

2008/06/30 by J. Jaroszyński, J. Jaroszynski, S. C. Riggs +31
Materials Science · Physics and Astronomy · #Condensed matter physics #Electrical resistivity and conductivity #Iron-based superconductors research #Magnetic field #Materials science #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.78.064511

published as Phys. Rev. B 78, 064511 (2008) · 6 pages, 3 figures

arxiv created 2008/07/21 · openalex publication_date 2008/08/12 · arxiv updated 2013/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We compare magnetotransport of the three iron-arsenide-based compounds ReFeAsO (Re=La, Sm, Nd) in very high DC and pulsed magnetic fields up to 45 and 54 T, respectively. Each sample studied exhibits a superconducting transition temperature near the maximum reported to date for that particular compound. While high magnetic fields do not suppress the superconducting state appreciably, the resistivity, Hall coefficient, and critical magnetic fields, taken together, suggest that the phenomenology and superconducting parameters of the oxypnictide superconductors bridges the gap between MgB₂ and YBCO.

Citations

• Iron-based layered compound LaFeAsO is an antiferromagnetic semimetal
• Evidence for electromagnetic granularity in the polycrystalline iron-based superconductor LaO0.89F0.11FeAs
• The effect of internal pressure on the tetragonal to monoclinic structural phase transition in ReOFeAs: the case of NdOFeAs
• Minimal two-band model of the superconducting iron oxypnictides
• Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
• Superconductivity at 53.5 K in GdFeAsO1−δ
• A generic two-band model for unconventional superconductivity and spin-density-wave order in electron- and hole-doped iron-based superconductors
• Superconductivity in the iron-based F-doped layered quaternary compound Nd[O 1 − x F x ]FeAs