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

Abstract

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

Citation Formats

Martinez-Lope, M.J., Retuerto, M., Alonso, J.A., and Pomjakushin, V. Synthesis and study of the crystallographic and magnetic structure of DyFeMnO{sub 5}: A new ferrimagnetic oxide. United States: N. p., 2008. Web. doi:10.1016/j.jssc.2008.05.009.
Martinez-Lope, M.J., Retuerto, M., Alonso, J.A., & Pomjakushin, V. Synthesis and study of the crystallographic and magnetic structure of DyFeMnO{sub 5}: A new ferrimagnetic oxide. United States. doi:10.1016/j.jssc.2008.05.009.
Martinez-Lope, M.J., Retuerto, M., Alonso, J.A., and Pomjakushin, V. 2008. "Synthesis and study of the crystallographic and magnetic structure of DyFeMnO{sub 5}: A new ferrimagnetic oxide". United States. doi:10.1016/j.jssc.2008.05.009.
@article{osti_21128425,
title = {Synthesis and study of the crystallographic and magnetic structure of DyFeMnO{sub 5}: A new ferrimagnetic oxide},
author = {Martinez-Lope, M.J. and Retuerto, M. and Alonso, J.A. and Pomjakushin, V.},
abstractNote = {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} square 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.},
doi = {10.1016/j.jssc.2008.05.009},
journal = {Journal of Solid State Chemistry},
number = 9,
volume = 181,
place = {United States},
year = 2008,
month = 9
}
  • The hydrothermal synthesis, crystal structure and magnetic properties of the new copper silicate Na{sub 2}Cu{sub 5}(Si{sub 2}O{sub 7}){sub 2}, are reported. The crystal structure was determined through synchrotron powder diffraction data. The unit cell was indexed to a triclinic cell, space group P-1 (n{sup o} 2) with unit cell parameters a=5.71075(2)A, b=7.68266(3)A, c=7.96742(3)A, {alpha}=64.2972(2){sup o}, {beta}=88.4860(2){sup o} and {gamma}=70.5958(2){sup o} with Z=1. A structural model was obtained through a combination of a direct-space Monte-Carlo approach and Rietveld refinement. The crystal structure contains parallel chains consisting of zig-zag copper dimers and trimers. All silicon atoms are present as part of amore » [Si{sub 2}O{sub 7}]{sup 6-} anion that connects the chains; therefore the compound belongs to the sorosilicate mineral family. The magnetic susceptibility was measured and shows a behavior typical of one-dimensional ferrimagnetism, in agreement with the observed structure.« less
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  • Growth of magnetic iron oxide thin films by a chemical vapor deposition process from metallorganic iron acetyl acetonate precursor under atmospheric Ar-O{sub 2} transport is described. Kinetics of film growth depends on deposition parameters, particularly substrate temperature, gas flow rate, and location of substrate away from the source which is a direct effect of mass transfer and pyrolyzing efficiency of precursor vapor. As-deposited films essentially have {alpha}-Fe{sub 2}O{sub 3} phase which is transformed by a sequential reduction-oxidation process into Fe{sub 3}O{sub 4} and {gamma}-Fe{sub 2}O{sub 3} phases as revealed by electron diffraction studies. The modification in the crystalline phase ofmore » the as-deposited film is observed by varying the substrate orientation and Ar to O{sub 2} gas-phase ratios. The {gamma}-Fe{sub 2}O{sub 3} phase of iron oxide films in the as deposited form, is realized by using pure Ar as transport gas. Microstructural changes as well as magnetic properties of iron oxide thin films on transformation into different polymorphic crystallographic phases are described.« less
  • Single crystals of (ThCu/sub 3/)(Mn/sub 2//sup 3 +/Mn/sub 2//sup 4 +/)O/sub 12/, a ferrimagnetic perovskite-like compound, have been synthesized by hydrothermal conditions at 600/sup 0/C and 2 kbar. They have been found to be cubic, of space group Im3, with a = 7.359 A, and isostructural with (NaMn/sub 3/)(Mn/sub 2//sup 3 +/Mn/sub 2//sup 4 +/)O/sub 12/. The crystal structure has been refined by single-crystal x-ray diffraction data. The Th/sup 4 +/ cations are surrounded by slightly distorted icosahedra; the Th--O distance is 2.556 A. The Cu/sup 2 +/ cations are also surrounded by 12 oxygens, which are arranged as threemore » mutually perpendicular rectangles of different size, the smallest and the largest of which are almost squares. The three sets of Cu--O distances are 1.973, 2.800, and 3.238 A. The octahedral Mn--O distance is 1.950 A. A test based on neutron diffraction powder data indicated that the square sites are occupied by only the Cu/sup 2 +/ cations.« less
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