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Title: Synthesis, structure, and magnetic properties of the novel sodium cobalt tellurate Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36}

The novel single crystal oxide Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} had been successfully synthesized by a self-flux method. Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} crystallizes in hexagonal symmetry, space group P6{sub 3}/m (No.176), with lattice parameters a=9.359 (3) Å, c=9.096 (8) Å, and Z=1. The structure is composed of combining the edge-sharing chains of octahedra, [TeO{sub 6}]{sup 6−} and [Co(1)O{sub 6}]{sup 10−} with the face-sharing chains of triangular prisms, [Co(2)O{sub 6}]{sup 10−} and [Co(3)(Na(3))O{sub 6}]{sup 10−}. Sodium ions partially occupy hexagonal channels along the c-axis that are formed by the connection of the chains. The magnetic susceptibility data show a long-range antiferromagnetic ordering with a Neel temperature of 52 K along the c axis. At temperatures above 200 K, the susceptibility corrected for the diamagnetic contribution can be fit to the Curie–Weiss law for Co{sup 2+} (S=3/2). The anisotropic ferromagnetic and antiferromagnetic feature of Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} was obtained through field-dependent magnetization measurements at low temperature. The ferromagnetic and antiferromagnetic behaviors can be considered from the interactions between the Co ions in 1D zig-zag chains formed by sharing the edges of the Co(1)O{sub 6} octahedra, and the interactions between the interchain Co ions, respectively. -- Graphical abstract: The unitmore » cell (a) and perspective view along [001] (b) of novel single crystal oxide, Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36}. Highlights: • A single crystal of Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} has been synthesized by a self-flux method. • Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} crystallizes in hexagonal symmetry with a space group P6{sub 3}/m. • Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} has an antiferromagnetic ordering with a Neel temperature of 52 K. • Na{sub 5}Co{sub 15.5}Te{sub 6}O{sub 36} shows anisotropic ferro- and antiferromagnetism at low temperatures.« less
Authors:
 [1] ;  [1] ;  [2] ; ;  [1]
  1. Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya 321-8585 (Japan)
  2. Division of Chemistry, Graduate School of Science, Hokkaido University, Kita10-Nishi8, Sapporo 060-0810 (Japan)
Publication Date:
OSTI Identifier:
22275847
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 211; Journal Issue: Complete; Other Information: Copyright (c) 2013 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; ANISOTROPY; ANTIFERROMAGNETISM; COBALT; COBALT IONS; HEXAGONAL LATTICES; INTERACTIONS; LATTICE PARAMETERS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MONOCRYSTALS; NEEL TEMPERATURE; OXIDES; SODIUM; SODIUM IONS; SPACE GROUPS; SYNTHESIS