Neutron Diffraction Studies of Nanoparticle DyMnO3 Compound
A. Szytułaa, B. Penca, V. Dyakonovb, c, S. Barana and A. Hoserd
aM. Smoluchowski Institute of Physics, Jagiellonian University, W.S. Reymonta 4, 30-059 Kraków, Poland
bInstitute of Physics, PAS, al. Lotników 32/46, 02-668 Warszawa, Poland
cA.A. Gałkin Donetsk Physico-Technical Institute, NANU, R. Luxemburg 72, 83 114 Donetsk, Ukraine
dHelmholtz-Zentrum Berlin, Hahn-Meitner Pl. 1, 14 109 Berlin, Germany
Received: May 20, 2013; In final form: November 5, 2013
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The neutron powder diffraction (NPD) measurements of the nano-size DyMnO3 manganite have been performed. The obtained results indicate that this compound crystallizes in the orthorhombic crystal structure described by the space group Pnma. The Mn and Dy moments order antiferromagnetically at different temperatures and form modulated magnetic structure described by the propagation vector k=(kx, 0, 0) with the different values of kx component for the Mn and Dy sublattices. The values of kx component for Mn sublattice increase with decreasing of the temperature and are smaller that in bulk compound. The wide Bragg peaks related to the Dy sublattice suggest that the magnetic order in this sublattice has the cluster-like character.

DOI: 10.12693/APhysPolA.125.65
PACS numbers: 61.05.F-, 75.25.-j, 75.50.Ee