TY  - JOUR
AU  - Tegel, M.
AU  - Schmid, T.
AU  - Stuerze, T.
AU  - Egawa, M.
AU  - Su, Y.
AU  - Senyshyn, A.
AU  - Johrendt, D.
TI  - Possible magnetic order and suppression of superconductivity by V doping in Sr2VO3FeAs
JO  - Physical review / B
VL  - 82
IS  - 14
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-13763
SP  - 140507
PY  - 2010
N1  - This work was financially supported by the German Research Foundation (DFG), under Project No. JO257/6-1.
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000283291500001
DO  - DOI:10.1103/PhysRevB.82.140507
UR  - https://juser.fz-juelich.de/record/13763
ER  -