Ferrimagnetic order in the insulating Sr3Fe2ReO9 double perovskite.

E. V. PANNUNZIO MINER; J.M. DE PAOLI; J. A. ALONSO; M. GARCÍA-HERNÁNDEZ; R.D.SANCHEZ; R. E. CARBONIO

PHYSICA B - CONDENSED MATTER

Elsevier

Año: 2007 vol. 398 p. 397 - 400

0921-4526

A new iron(III)/rhenium(VI) double perovskite oxide, Sr3Fe2ReO9, has been synthesized in polycrystalline form at 1200C by solidstate 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)A ¢ª , b = 5.56796(1)A ¢ª and c = 7.90224(2)A ¢ª . 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 system displays a spontaneous magnetization, and hysteresis loops are observed.