Details

Autor(en) / Beteiligte

• Battle, P.D
• Blake, G.R
• Gibb, T.C
• Vente, J.F

Titel

Structural Chemistry and Electronic Properties of Sr2FeIrO6

Ist Teil von

• Journal of solid state chemistry, 1999-07, Vol.145 (2), p.541-548

Ort / Verlag

San Diego, CA: Elsevier Inc

Erscheinungsjahr

1999

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• A polycrystalline sample of Sr2FeIrO6 has been synthesized and shown by a combination of X-ray diffraction, neutron diffraction, magnetometry, and Mössbauer spectroscopy to be a triclinic (space group I1; a=5.54996(3) Å, b=5.57847(3) Å, c=7.84165(3) Å, α=89.990(1)°, β=90.059(1)°, γ=90.079(1)°) perovskite, with a partially ordered (0.928:0.072(4)) distribution of transition metal cations over the six-coordinate sites. The predominant oxidation states are Fe3+ and Ir5+, although the Mössbauer data suggest that ∼4% Fe4+ is present. The compound is a Type II antiferromagnet below 120 K, with an ordered magnetic moment on the Fe-dominated sites of 3.67(3) μB per Fe3+ cation. The spins associated with the antisite defects are frustrated and do not take part in the long-range magnetic ordering, consequently giving rise to hysteresis in the magnetic susceptibility below 40 K. The possible location of the Fe4+ cations is discussed briefly.