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Title: Synthesis and study of the crystallographic and magnetic structure of DyFeMnO{sub 5}: A new ferrimagnetic oxide

The title oxide has been obtained by replacing Mn{sup 3+} by Fe{sup 3+} in the parent oxide DyMn{sub 2}O{sub 5}. The crystallographic and magnetic structures have been analysed from neutron powder diffraction (NPD) data, in complement with susceptibility and magnetic measurements. DyFeMnO{sub 5} is orthorhombic, belonging to the Pbam space group as the parent compound. The crystal structure contains infinite chains of edge-sharing Mn{sup 4+}O{sub 6} octahedra, interconnected by dimer units of Fe{sup 3+}O{sub 5} square pyramids. There is a certain antisite disorder in the crystal structure, with 8.0% of the Mn{sup 4+} sites occupied by Fe cations, and 8.2% of the Fe{sup 3+} positions occupied by Mn{sup 3+} cations. The magnetization measurements show that DyFeMnO{sub 5} presents magnetic order below T{sub C}{approx}178 K; a study of the magnetic structure from the low-temperature NPD patterns indicates an antiferromagnetic coupling of the Mn{sup 4+} and Fe{sup 3+} spins, with the polarization of the Dy{sup 3+} magnetic moments parallel to the those of the Fe sublattice. - Graphical abstract: DyFeMnO{sub 5} is orthorhombic (Pbam) as the parent DyMn{sub 2}O{sub 5} oxide. The crystal structure contains infinite chains of edge-sharing Mn{sup 4+}O{sub 6} octahedra, interconnected by dimer units of Fe{sup 3+}O{sub 5} squaremore » pyramids. It is ferrimagnetic below T{sub C}{approx}178 K; a NPD study indicated an antiferromagnetic coupling of the Mn{sup 4+} and Fe{sup 3+} spins, with Dy{sup 3+} magnetic moments parallel to those of Fe.« less
Authors:
;  [1] ;  [2] ;  [3]
  1. Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid (Spain)
  2. Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid (Spain), E-mail: ja.alonso@icmm.csic.es
  3. Laboratory for Neutron Scattering, ETHZ and PSI, CH-5232 Villigen PSI (Switzerland)
Publication Date:
OSTI Identifier:
21128425
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 181; Journal Issue: 9; Other Information: DOI: 10.1016/j.jssc.2008.05.009; PII: S0022-4596(08)00247-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANTIFERROMAGNETISM; CATIONS; CRYSTALLOGRAPHY; DYSPROSIUM IONS; DYSPROSIUM OXIDES; IRON IONS; MAGNETIC MOMENTS; MAGNETIZATION; MANGANESE IONS; MANGANESE OXIDES; NEUTRON DIFFRACTION; ORTHORHOMBIC LATTICES; POLARIZATION; SPACE GROUPS; SYNTHESIS