Journal Article

PreJuSER-13763

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Possible magnetic order and suppression of superconductivity by V doping in Sr2VO3FeAs

Tegel, M. ; Schmid, T. ; Stuerze, T. ; Egawa, M. ; Su, Y.FZJ* ; Senyshyn, A. ; Johrendt, D.

2010
APS College Park, Md.

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/10953  doi:10.1103/PhysRevB.82.140507

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 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.

Keyword(s): J

Note: This work was financially supported by the German Research Foundation (DFG), under Project No. JO257/6-1.

---

Contributing Institute(s):

1. Streumethoden (IFF-4)
2. Neutronenstreuung (IFF-5)
3. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)

Research Program(s):

1. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)
2. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)

Experiment(s):

1. DNS: Diffuse scattering neutron time of flight spectrometer (NL6S)
2. SPODI: High resolution powder diffractometer (SR8a)

Appears in the scientific report 2010

---

Database coverage:
;

---