Suppression of superconductivity by V-doping and possible magnetic order in Sr2VO3FeAs

Abstract

Superconductivity at 33 K in Sr2VO3FeAs is completely suppressed by small amounts of V-doping in Sr2VO3[Fe0.93(+/-0.01)V0.07(+/-0.01)]As. The crystal structures and exact stoichiometries are determined by combined neutron- and x-ray powder diffraction. Sr2VO3FeAs is shown to be very sensitive to Fe/V mixing, which interferes with or even suppresses superconductivity. This inhomogeneity may be intrinsic and explains scattered reports regarding Tc and reduced superconducting phase fractions in Sr2VO3FeAs. Neutron diffraction data collected at 4 K indicates incommensurate mag- netic ordering of the V-sublattice with a propagation vector q = (0,0,0.306). This suggests strongly correlated vanadium, which does not contribute significantly to the Fermi surface of Sr2VO3FeAs.

text revised, magnetic q-vector added, one reference added 4 pages, 4 figures

References in corpus (14)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Unconventional sign-reversing superconductivity in LaFeAsO_(1-x)F_x
• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• The superconductivity at 18 K in LiFeAs system
• Transition of stoichiometricSr2VO3FeAs to a superconducting state at 37.2 K
• A key role for unusual spin dynamics in ferropnictides
• Structure, antiferromagnetism and superconductivity of the layered iron arsenide NaFeAs
• New iron-based arsenide oxides (Fe2As2)(Sr4M2O6)(M = Sc, Cr)
• Self doping effect and successive magnetic transitions in superconducting Sr${}_2$VFeAsO${}_3$
• Sr${}_2$VO${}_3$FeAs as Compared to Other Fe-based Superconductors
• Sr${}_2$VO${}_3$FeAs: A Nanolayered Bimetallic Iron Pnictide Superconductor
• The layered iron arsenides Sr2CrO3FeAs and Ba2ScO3FeAs
• Non-stoichiometry and the magnetic structure of Sr2CrO3FeAs

Cited by in corpus (11)

• Superconductivity in Iron Compounds
• Superconductivity up to 35 K in the iron-platinum arsenides (CaFe1-xPtxAs)10Pt4-yAs8 with layered structures
• Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
• Superconductivity and Crystal Structure of the Palladium-Iron-Arsenides Ca10(Fe1-xPdxAs)10Pd3As8
• Static magnetic order of Sr${}_4$A${}_2$O${}_6$Fe${}_2$As${}_2$ (A = Sc and V) revealed by local probes
• Weak magnetism and the Mott-state of vanadium in superconducting Sr2VO3FeAs
• Direct observation of the influence of the FeAs4 tetrahedron on superconductivity and antiferromagnetic correlations in Sr2VO3FeAs
• Superconducting transition temperatures in the electronic and magnetic phase diagrams of Sr2VFeAsO3-delta, a superconductor
• Pressure Dependence of Superconducting Transition Temperature on Perovskite-Type Fe-Based Superconductors and NMR Study of Sr2VFeAsO3
• Coupled Magnetic and Superconducting Transitions in Sr${}_2$VO${}_3$FeAs Under Pressure
• Role of Vanadium-Oxide Layer in Electronic State of Sr${}_2$VFeAsO${}_{3-\delta }$ with Oxygen Deficiency