Structure and magnetic properties of Sr2CoWO6, an ordered double perovskite containing Co2+(HS) with unquenched orbital magnetic moment

M.C. VIOLA; M.J. MARTÍNEZ-LOPE; J.A. ALONSO; J.L. MARTÍNEZ; J. M. DE PAOLI; S. PAGOLA; J.C. PEDREGOSA; M.T. FERNÁNDEZ-DÍAZ; R.E. CARBONIO

American Chemical Society

Año: 2003 vol. 15 p. 1655 - 1655

p>Sr2CoWO6 perovskite has been prepared in polycrystalline form by solid-state reaction at 1150 °C. This material has been studied by high-resolution synchrotron X-ray and neutron powder diffraction (NPD), magnetic measurements, and differential scanning calorimetry (DSC). At room temperature, the crystal structure is tetragonal, space group I4/m, with a=5.58277(1) Å and c=7.97740(1) Å. The structure contains alternating CoO6 and WO6 octahedra, tilted in anti-phase by 7.24° in the basal ab plane along the [001] direction of the pseudocubic cell. This corresponds to the a0a0c- Glazer’s notation as derived by Wood