title: Geometric magnetic frustration in Ba(2)Sn(2)Ga(3)ZnCr(7)O(22): a two-dimensional spinel based Kagomé lattice.
abstract: The properties of a two-dimensional geometrically frustrated magnetic material based on the Kagomé net, Ba(2)Sn(2)ZnGa(3)Cr(7)O(22), are reported. The Kagomé net is fully filled with magnetic ions. A Curie-Weiss theta theta(W) = -312 K is found with a spin glass transition at approximately 1.5 K, indicating strong geometrical magnetic frustration. This compound is the most two dimensional of a structural series with the geometrically frustrated materials ZnCr(2)O(4) and SrCr(8)Ga(4)O(19). The comparison of their properties tests the influence of different degrees of coupling between Kagomé layers on magnetic frustration within a single chemical and structural family.
authors.affiliation: Department of Chemistry and Princeton Materials Institute, Princeton University, New Jersey 08544, USA.
authors.forename: I S
authors.initials: IS
authors.lastname: Hagemann
authors.forename: Q
authors.initials: Q
authors.lastname: Huang
authors.forename: X P
authors.initials: XP
authors.lastname: Gao
authors.forename: A P
authors.initials: AP
authors.lastname: Ramirez
authors.forename: R J
authors.initials: RJ
authors.lastname: Cava