Neutron-diffraction andMössbauer-spectroscopy study of La0.6Sr0.4Fe1−xCoxO3−y (x = 0, 0.5) perovskites

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Neov, S. and Dabrowski, L. and Hofmann, M. and Bouwmeester, H.J.M. (2002) Neutron-diffraction andMössbauer-spectroscopy study of La0.6Sr0.4Fe1−xCoxO3−y (x = 0, 0.5) perovskites. Applied physics A: Materials science & processing, 74 (1, Suppl.). S664-S666. ISSN 0947-8396

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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. 57Fe 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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Copyright:© 2002 Springer
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/72249
Official URL:http://dx.doi.org/10.1007/s003390201621
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