Crystal structure and magnetic properties of the solid-solution phase Ca3Co2−vScvO6期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Crystal structure and magnetic properties of the solid-solution phase Ca₃Co₂₋_vSc_vO₆

Authors:	Charles H. Hervoches,Vivian Miksch Fredenborg,Helmer Fjellvå g

Affiliation:	^a Institute for Energy Technology, N-2007 Kjeller, Norway ^b Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, N-0315 Oslo, Norway

Abstract:	The two crystallographically non-equivalent Co atoms of the quasi-one-dimensional crystal structure of Ca₃Co₂O₆ form chains with alternating, face-sharing polyhedra of Co2O₆ trigonal prisms and Co1O₆ octahedra. This compound forms a substitutional solid-solution phase with Sc, in which the Sc atoms enter the Co2 sublattice exclusively. The homogeneity range of Ca₃Co₂₋_vSc_vO₆ (more specifically Ca₃Co1Co2₁₋_vSc_vO₆) extends up to v≈0.55. The crystal structure belongs to space group R3¯c with lattice parameters (in hexagonal setting): 9.0846(3)?a?9.1300(2) Å and 10.3885(4)?c?10.4677(4) Å. The magnetic moment decreases rapidly with increasing amount of the non-magnetic Sc solute in the lattice.

Keywords:	Scandium substitution Ca₃Co₂O₆ structure Low-dimensional material Magnetic properties
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