Co3(SO4)3(OH)2[enH2]: A New S=3/2 Kagome-Type Layered Sulfate with a Unique Connectivity

ANTHONY V. POWELL; PATRICIA LEYVA-BAILEN; PAZ VAQUEIRO; RODOLFO D. SANCHEZ

CHEMISTRY OF MATERIALS

AMER CHEMICAL SOC

Año: 2009 vol. 21 p. 4102 - 4104

0897-4756

The Kagome lattice, comprising a two-dimensional array of corner-sharing equilateral triangles, is central to the exploration of magnetic frustration.1 In such a lattice, antiferromagnetic coupling between ions in triangular plaquettes prevents all of the exchange interactions being simultaneously satisfied, and a variety of novel magnetic ground states may result at low temperature. Experimental realization of a Kagome lattice remains difficult. The jarosite family of materials of nominal composition AM3(SO4)2(OH)6 (A=monovalent cation; M=Fe3+, Cr3+), offers perhaps one of the most promising manifestations of the phenomenon of magnetic frustration in two dimensions. The magnetic properties of jarosites are however extremely sensitive to the degree of coverage of magnetic sites. Consequently, there is considerable interest in the use of soft chemical techniques for the design and synthesis of novel materials in which toexplore the effects of spin, degree of site coverage, and connectivity on magnetic frustration.