%0 Journal Article
%A Tegel, M.
%A Schmid, T.
%A Stuerze, T.
%A Egawa, M.
%A Su, Y.
%A Senyshyn, A.
%A Johrendt, D.
%T Possible magnetic order and suppression of superconductivity by V doping in Sr2VO3FeAs
%J Physical review / B
%V 82
%N 14
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-13763
%P 140507
%D 2010
%Z This work was financially supported by the German Research Foundation (DFG), under Project No. JO257/6-1.
%X 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 powder diffraction 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 T-c and reduced superconducting phase fractions in Sr2VO3FeAs. Neutron-diffraction data collected at 4 K indicate incommensurate magnetic ordering of the V sublattice with a propagation vector q approximate to(0,0,0.306). This suggests strongly correlated vanadium, which does not contribute significantly to the Fermi surface of Sr2VO3FeAs.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000283291500001
%R 10.1103/PhysRevB.82.140507
%U https://juser.fz-juelich.de/record/13763