Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/10982
Title: Structural and magnetic studies of the ruthenium perovskites Ba2-xSrxHoRuO6
Authors: Injac, S
Kayser, P
Avdeev, M
Kennedy, BJ
Keywords: Perovskite
Antiferromagnetism
Crystal structure
Phase transformations
Ruthenium
Magnetic properties
Neutron diffraction
X-ray diffraction
Issue Date: 1-Jul-2018
Publisher: Elsevier
Citation: Injac, S., Kayser, P., Avdeev, M., & Kennedy, B. J. (2018). Structural and magnetic studies of the ruthenium perovskites Ba2-xSrxHoRuO6. Journal of Solid State Chemistry, 263, 36-43. doi:10.1016/j.jssc.2018.04.003
Abstract: The series of ruthenate double perovskites Ba2-xSrxHoRuO6 (0 ≤ x ≤ 2) have been synthesized using solid state methods. The crystal structures of the series have been determined by high resolution synchrotron X-ray diffraction and show the sequence of structures to be Fm3̅m (a0a0a0) (0 ≤ x ≤ 0.6) → I4/m (a0a0c-) (x = 0.8) → I2/m (a0b-b-) (1.0 ≤ x ≤ 1.2) → P21/n (a-a-c+) (1.4 ≤ x ≤ 2.0). A similar progression of structures is observed in the sample BaSrHoRuO6 with increasing temperature. Magnetic characterisation of these materials was undertaken utilising variable temperature bulk magnetic susceptibility, isothermal magnetisation and low temperature neutron powder diffraction measurements. All members of the series order antiferromagnetically with the Ru and Ho sublattices ordering at different temperatures between 50 and 16 K. The presence of the magnetic Ho3+ at the perovskite B site stabilises the antiferromagnetic (AFM) ordering of the Ru sublattice. The addition of Sr for Ba beyond x = 1.2 weakens the AFM superexchange interactions through induced structural distortions, resulting in a canted AFM ground state. © 2018 Elsevier Inc.
URI: https://doi.org/10.1016/j.jssc.2018.04.003
https://apo.ansto.gov.au/dspace/handle/10238/10982
ISSN: 0022-4596
Appears in Collections:Journal Articles

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