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Title: Crystal structure and magnetic properties of titanium-based CuTi{sub 2−x}M{sub x}S{sub 4} and CuCr{sub 2−x}Ti{sub x}Se{sub 4} chalcospinels

CuTi{sub 2−x}M{sub x}S{sub 4} (M=Fe, Mn, Co; x=0.3, 0.5) and CuCr{sub 2−x}Ti{sub x}Se{sub 4} (x=0.3, 0.5, 0.7) chalcospinels were synthesized by conventional solid-state reactions. Their crystal structures were determined by single-crystal X-ray diffraction. All of the phases crystallized in cubic spinel-type structures (space group, Fd3{sup ¯}m). For all of the chalcospinel compounds, the edge-length distortion parameter (ELD) indicated that the most distorted polyhedron was Q[(Ti,M){sub 3}Cu], which displayed an ∼8% distortion from an ideal tetrahedron structure (Q=S or Se). The Mn-based thiospinel CuMn{sub 0.3}Ti{sub 1.7}S{sub 4} is paramagnetic, whereas the Fe-based thiospinels (CuTi{sub 2−x}Fe{sub x}S{sub 4}; x=0.3 and 0.7) are strongly antiferromagnetic due to their spin-glass states. The magnetic susceptibility measurements indicated ferromagnetic behavior for the selenospinels (CuCr{sub 2−x}Ti{sub x}Se{sub 4}; x=0.3, 0.5 and 0.7). - Graphical abstract: View along [1 0 0] of CuCr{sub 2−x}Ti{sub x}Se{sub 4} crystal structure showing tetrahedral and octahedral units. To the right, experimental X-ray powder diffraction pattern of CuCr{sub 1.7}Ti{sub 0.3}Se{sub 4} (top) in compared (in a like-mirror representation) to a simulated X-ray pattern from single-crystal data (bottom). - Highlights: • Chalcogenides belong to the family of compounds spinel-type. • Resolved single crystals of the solid solutions have space group Fd-3m. • The distortionmore » of the tetrahedral and octahedral volume were calculated. • These solid solutions shows a ferromagnetic or spin-glass behavior.« less
Authors:
 [1] ;  [2] ; ;  [2] ;  [3]
  1. Facultad de Ciencias Básicas, Universidad Católica del Maule, Talca (Chile)
  2. Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago (Chile)
  3. Institut des Sciences Chimiques de Rennes, UMR 6226, Université de Rennes 1, Rennes (France)
Publication Date:
OSTI Identifier:
22334171
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 212; Other Information: Copyright (c) 2014 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; CHALCOGENIDES; CUBIC LATTICES; MAGNETIC SUSCEPTIBILITY; MONOCRYSTALS; PARAMAGNETISM; SIMULATION; SOLID SOLUTIONS; SOLIDS; SPACE GROUPS; SPIN GLASS STATE; SPINELS; TITANIUM; X RADIATION; X-RAY DIFFRACTION