ACTA

Neutron Diffraction Studies of Nanoparticle DyMnO₃ Compound

A. Szytuła^a, B. Penc^a, V. Dyakonov^{b, c}, S. Baran^a and A. Hoser^d
^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=(k_x, 0, 0) with the different values of k_x component for the Mn and Dy sublattices. The values of k_x 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