Charge and magnetic ordering in Ba3YIr2O9
Iridium compounds are a rather interesting class of materials due to the importance of spin-orbit coupling in these systems which gives rise to the observation of novel phases. Here, we would like to study the perovskite iridate Ba3YIr2O9, which forms a crystal structure with Ir-Ir dimmers along the c-axis and triangular structure in the ab plane. The valence state of Ir ions is 4.5+, and magnetic ordering below ~4 K has been indicated in specific heat, NMR and muSR measurements. But whether there is a charge ordering of Ir4+ and Ir5+ ions, and any information about the magnetic structure are still missing. In order to answer these questions and to study the significance of spin-orbit coupling for the magnetic ordering, we propose to measure the crystal and magnetic structure at the D2B diffractometer.
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GUO Hanjie; FERNANDEZ DIAZ Maria Teresa and KOMAREK Alexander Christoph. (2018). Charge and magnetic ordering in Ba3YIr2O9. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2564
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