Ferrimagnetic order in the insulating Sr3Fe2ReO9 double perovskite

ELISA V. PANNUNZIO-MINER; JUAN M. DE PAOLI; JOSÉ A. ALONSO; M. GARCÍA-HERNÁNDEZ; RODOLFO D. SÁNCHEZ; RAÚL E. CARBONIO

Elsevier

Año: 2007 vol. 398 p. 397 - 397

p style="TEXT-ALIGN: justify; LINE-HEIGHT: 200%; MARGIN: 0cm 0cm 0pt; TEXT-AUTOSPACE: ; mso-layout-grid-align: none" class="MsoNormal">A new iron(III)/rhenium(VI) double perovskite oxide, Sr3Fe2ReO9, has been synthesized in polycrystalline form at 1200o C by solid state reaction from citrate precursors. The Rietveld analysis of the synchrotron X-ray powder diffraction pattern shows that this compound, at 300 K, has orthorhombic symmetry (S.G.: Immm), with a = 5.56733(1) Å, b = 5.56796(1) Å and c = 7.90224(2) Å. The refinement of the relative Fe/Re occupancies of each B site reveals the presence of a partial cationic order. At high temperatures, the magnetic susceptibility of the Sr3Fe2ReO9 is well described as a paramagnet with ferrimagnetic correlations. Below 450 K, the