1. The crystal and magnetic structures of the ordered perovskite Pb2FeSbO6 studied by neutron diffraction and Mössbauer spectroscopy.
- Author
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Argymbek, B., Kmjec, T., Chlan, V., Kohout, J., Kichanov, S.E., Kozlenko, D.P., and Savenko, B.N.
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CRYSTAL structure , *MAGNETIC structure , *PEROVSKITE , *NEUTRON diffraction , *MOSSBAUER spectroscopy - Abstract
Highlights • The magnetic properties of ordered double perovskite Pb 2 FeSbO 6 were studied in details. • Unexpected long-range antiferromagnetic ordering in Pb 2 FeSbO 6 compound was found. • The antiferromagnetic phase in Pb 2 FeSbO 6 formed on the cation disordering structural domains. • The propagation vector of the antiferromagnetic phase is q = (½, ½, 0). • Under cooling, the structural phase transition in Pb 2 FeSbO 6 occurs. Abstract The structural and magnetic ordering of Pb 2 FeSbO 6 was studied by means of Mössbauer spectroscopy and neutron powder diffraction in the temperature range from 5 to 300 K. The structural phase transition from the initial cubic phase Fm 3 ¯ m to the tetragonal I 4 / m phase was observed in temperature range 170–190 K. The antiferromagnetic order with a propagation vector q = (½, ½, 0) was found at temperature T < T N = 30 K. The temperature dependences of the hyperfine parameters of Mössbauer spectra and magnetic moments for Pb 2 FeSbO 6 at low temperatures were obtained. The relationships between the short-range cation ordering observed by Mossbauer spectroscopy and the long-range cation ordering observed by neutron powder diffraction are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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