Abstract.
The crystal and magnetic structure of La0.6Sr0.4Fe1-xCoxO3-y (x=0,0.5) perovskites was studied by neutron diffraction and Mössbauer spectroscopy. At T=2–300 K the oxides possess an oxygen-deficient, rhombohedrally distorted structure, with space group R\overline{3}c. 57 Fe Mössbauer spectra below T=154 K show a regular arrangement of Fe spins, determined as a G-type antiferromagnetic structure by neutron diffraction. The mean magnetic moment at T=40 K is 1.61 μB per B-site for x=0.5, and 2.63 μB for the x=0 composition. An increase of TN and oxygen deficiency accompany the heating to 850 K. The structure of La0.6Sr0.4Fe0.5Co0.5O2.84 at 850 K is cubic with space group Pm3m.
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Received: 18 July 2001 / Accepted: 11 December 2001
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Neov, S., Dabrowski, L., Hofmann, M. et al. Neutron-diffraction and Mössbauer-spectroscopy study of La0.6Sr0.4Fe1-xCoxO3-y (x=0, 0.5) perovskites . Appl Phys A 74 (Suppl 1), s664–s666 (2002). https://doi.org/10.1007/s003390201621
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DOI: https://doi.org/10.1007/s003390201621