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Title: Crystal and magnetic structures of Cr{sub 1∕3}NbSe{sub 2} from neutron diffraction

Neutron diffraction measurements of the Cr intercalated niobium diselenide Cr{sub 1∕3}NbSe{sub 2} together with magnetization measurements have revealed that this compound exhibits ferromagnetic ordering below T{sub C} = 96 K unlike a chiral helimagnetic order observed in the sulfide compound Cr{sub 1∕3}NbS{sub 2}. As derived from neutron diffraction data, the Cr magnetic moments μ{sub Cr} = 2.83 ± 0.03 μ{sub B} in Cr{sub 1∕3}NbSe{sub 2} are aligned within basal plane. The discrepancy in the magnetic states of Cr{sub 1∕3}NbS{sub 2} and Cr{sub 1∕3}NbSe{sub 2} is ascribed to the difference in the preferential site occupation of Cr ions in crystal lattices. In Cr{sub 1∕3}NbSe{sub 2}, the Cr ions are predominantly distributed over 2b Wyckoff site, which determines a centrosymmetric character of the crystal structure unlike Cr{sub 1∕3}NbS{sub 2}, where the Cr ions are mainly located in 2c position and the crystal structure is non-centrosymmetric.
Authors:
;  [1] ;  [2] ; ; ;  [3] ; ;  [4] ;  [5] ; ; ; ;  [6] ;  [6] ;  [7] ;  [6] ;  [8] ;  [9]
  1. M.N. Miheev Institute of Metal Physics, Russian Academy of Sciences, 620990 Yekaterinburg (Russian Federation)
  2. (Russian Federation)
  3. Institute of Natural Sciences, Ural Federal University, 620083 Yekaterinburg (Russian Federation)
  4. Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan)
  5. (Japan)
  6. Institute of Materials Structure Science, KEK, Tokai, Ibaragi 319-1106 (Japan)
  7. (China)
  8. (Graduate University for Advanced Studies), KEK, Tokai, Ibaragi 319-1106 (Japan)
  9. Aragón Materials Science Institute (CSIC - University of Zaragoza), 50009 Zaragoza (Spain)
Publication Date:
OSTI Identifier:
22494851
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 119; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHROMIUM IONS; CLATHRATES; CRYSTAL LATTICES; CRYSTALS; MAGNETIC MOMENTS; MAGNETIZATION; NEUTRON DIFFRACTION; NIOBIUM; SULFIDES