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Title: Crystal structure and magnetization of a Co{sub 3}B{sub 2}O{sub 6} single crystal

The crystal structure and magnetic properties of Co{sub 3}B{sub 2}O{sub 6} single crystals are studied. Orthorhombic symmetry with space group Pnnm is detected at room temperature. The measurements of static magnetization and dynamic magnetic susceptibility reveal two magnetic anomalies at T{sub 1} = 33 K and T{sub 2} = 10 K and an easy-axis magnetic anisotropy. The effective magnetic moment indicates a high-spin state of the Co{sup 2+} ion. A spin-flop transition is found at low temperatures and H{sub sf} = 23 kOe. EXAFS spectra of the K-edge absorption of Co are recorded at various temperatures, the temperature-induced changes in the parameters of the local environment of cobalt are analyzed, and the effective Co-Co and Co-O distances are determined. The magnetic interactions in the crystal are analyzed in terms of an indirect coupling model.
Authors:
;  [1] ;  [2] ; ; ; ; ; ; ;  [1] ;  [3]
  1. Russian Academy of Sciences, Kirensky Institute of Physics, Siberian Branch (Russian Federation)
  2. Siberian Federal University (Russian Federation)
  3. Russian Research Centre Kurchatov Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22210563
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 117; Journal Issue: 1; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ABSORPTION SPECTROSCOPY; ANISOTROPY; COBALT; COBALT BORIDES; COBALT IONS; FINE STRUCTURE; HIGH SPIN STATES; INTERACTIONS; MAGNETIC MOMENTS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MONOCRYSTALS; ORTHORHOMBIC LATTICES; SPACE GROUPS; SPECTRA; SPIN; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; X-RAY SPECTROSCOPY