Effects of oxygen deficiency on the magnetic ordering of Mn in Tb 0.9Na0.1MnO2.9

C. C. Yang, C. M. Wu, W. H. Li, T. S. Chan, R. S. Liu, Y. Y. Chen, M. Avdeev

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Monovalent Na+ ions have been incorporated into a multiferroic TbMnO3 compound. Structural studies, using high-resolution neutron diffraction patterns, show that monovalent Na+-doping results in a noticeable oxygen deficiency in the compound. The alternations in crystalline and magnetic structures due to oxygen deficiency are investigated by neutron diffraction and magnetic susceptibility measurements. Na-doping turns the modulated incommensurate Mn spin structure, observed for the parent compound, into a simple commensurate one. The observed magnetic diffraction patterns agree very well with that calculated assuming a D-type arrangement for the Mn spins, with the moments pointing along the c-axis direction. No significant alternation in the ordering temperature of the Mn moments is found.

Original languageEnglish
Article number104234
JournalJournal of Physics Condensed Matter
Issue number10
StatePublished - 12 Mar 2008


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