Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/11073
Title: Studies of the 4d and 5d 6H perovskites Ba3BM2O9, B = Ti, Zn, Y; M = Ru, Os, and cubic BaB1/3Ru2/3O3 polymorphs stabilised under high pressure
Authors: Injac, S
Solana-Madruga, E
Avdeev, M
Brand, HEA
Attfield, JP
Kennedy, BJ
Keywords: Magnetism
Oxides
X-ray diffraction
Magnetic properties
Cubic lattices
Antiferromagnetism
Pressure range mega pa 10-100
Temperature range 0400-1000 K
Issue Date: 5-Aug-2020
Publisher: Royal Society of Chemistry
Citation: Injac, S., Solana-Madruga, E., Avdeev, M., Brand, H. E. A., Attfield, J. P., & Kennedy, B. J. (2020). Studies of the 4d and 5d 6H perovskites Ba3BM2O9, B = Ti, Zn, Y; M = Ru, Os, and cubic BaB1/3Ru2/3O3 polymorphs stabilised under high pressure. Dalton Transactions, 49(35), 12222-12233. doi:10.1039/D0DT02349C
Abstract: The synthesis, structures and magnetism of six mixed 3d–5d oxides Ba3BM2O9 (B = Ti, Y, Zn; M = Ru, Os) are described. When prepared at ambient pressure the six oxides display a 6H type perovskite structure comprised of corner sharing BO6 and face sharing M2O9 motifs. Synchrotron X-ray diffraction reveals a small monoclinic distortion in Ba3ZnRu2O9; the remaining oxides exhibit a hexagonal structure. The magnetic properties are dominated by the M–M interactions across the shared face. Only in the mixed valent (M4+/M5+) Y oxides is evidence of long-range magnetic order found. Application of high pressure/high temperature synthetic methods for the Ru containing oxides changes the structure to the archetypical cubic Pm[3 with combining macron]m perovskite structure, where the B and Ru cations are disordered on the corner sharing BO6 octahedral sites. The magnetic properties of the cubic oxides are dominated by short range antiferromagnetic interactions, the chemical disorder inhibiting long range ordering. © The Royal Society of Chemistry 2020
URI: https://doi.org/10.1039/D0DT02349C
https://apo.ansto.gov.au/dspace/handle/10238/11073
ISSN: 1477-9234
Appears in Collections:Journal Articles

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