Kayser González, PaulaMartínez-Lope, Maria JesusAlonso, Jose AntonioRetuerto, MariaCroft, MarcIgnatov, AlexanderFernández-Díaz, Maria Teresa2024-01-172024-01-172013Kayser, P., et al. «Crystal Structure, Phase Transitions, and Magnetic Properties of Iridium Perovskites Sr 2 MIrO 6 (M = Ni, Zn)». Inorganic Chemistry, vol. 52, n.o 19, octubre de 2013, pp. 11013-22. https://doi.org/10.1021/ic401161d.0020-166910.1021/ic401161dhttps://hdl.handle.net/20.500.14352/93620Double perovskites containing Ir6+/Ir5+ with formula Sr2MIrO6 (M = Ni, Zn) have been synthesized under high oxygen pressure conditions. Their crystal structures have been studied by X-ray and neutron powder diffraction at room temperature (RT) and 2 K. At RT, these oxides crystallize in the monoclinic space group P21/n with unit-cell parameters a ≈ √2a0, b ≈ √2a0, and c ≈ 2a0, and β ≈ 90°. The thermal evolution of the structure of the Ni-containing compound shows the presence of two phase transition in the 373–673 K interval following the sequence P21/n → I4/m → Fm3̅m. These materials have also been characterized by magnetic measurements, suggesting the onset of antiferromagnetic interactions at TN = 58 and 46 K, for M = Ni, Zn, respectively. X-ray absorption spectroscopy sheds light on the oxidation states of M and Ir ions within these double perovskites.engjournal articlehttps://doi.org/10.1021/ic401161drestricted access546Ciencias23 Química