Structural and magnetic properties of the (Bi2-xPrx)Ru2O7 pyrochlore solid solution (0 <= x <= 2)

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dc.creatorZouari, Siwar
dc.creatorBallou, Rafik
dc.creatorCheikh-Rouhou, Abdelwaheb
dc.creatorStrobel, Pierre
dc.date2008-12-15
dc.date.accessioned2026-07-07T12:12:52Z
dc.date.available2026-07-07T12:12:52Z
dc.descriptionWe report a detailed study of structural and magnetic properties of the pyrochlore-type (Bi2-xPrx)Ru2O7 series. Eleven compositions with 0 <= x <= 2 were prepared by solid state reaction at 1050 degrees C and found to form a solid solution in the whole range of compositions. Structural refinements from X-ray powder diffraction data by the Rietveld method show that the main variation concerns the ruthenium site. Ru-O distances increase and the Ru-O-Ru angle (bridging corner-sharing Ru-O octahedra) decreases with increasing praseodymium content, in agreement with the metal-semiconductor transition observed previously in this system. Magnetic measurements show that the metallic Pauli paramagnetism of Ru in Bi2Ru2O7 evolves to a magnetism of localized low spin moments coexisting with the magnetism of Pr3+ cations moments. Strong magnetic correlations are present at high Pr content, as illustrated by a Néel temperature of -224 K for Pr2Ru2O7. However no evidence of a magnetic ordering was found, suggesting that the end compound Pr2Ru2O7 of the series might stabilize a spin liquid phase.
dc.identifierhttps://arxiv.org/abs/0812.2759
dc.identifierhttp://arxiv.org/abs/0812.2759
dc.identifierJournal of Alloys and Compounds (2009) (sous presse)
dc.identifierdoi:10.1016/j.jallcom.2008.09.106
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210687
dc.subjectMaterials Science
dc.titleStructural and magnetic properties of the (Bi2-xPrx)Ru2O7 pyrochlore solid solution (0 <= x <= 2)
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