A structurally perfect S = 1/2 kagome antiferromagnet

被引:644
作者
Shores, MP [1 ]
Nytko, EA [1 ]
Bartlett, BM [1 ]
Nocera, DG [1 ]
机构
[1] MIT, Dept Chem, Cambridge, MA 02139 USA
关键词
D O I
10.1021/ja053891p
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The syntheses and magnetic susceptibilities of a pure series of rare copper minerals from the atacamite family with general formula ZnxCu4-x(OH)6Cl2 (0 ≤ x ≤ 1) are reported. The structure of these compounds features a corner-sharing triangular kagomé lattice of antiferromagnetically coupled Cu(II) ions. We correlate the onset of magnetic ordering with the mole fraction of paramagnetic Cu(II) ions located between kagomé layers and demonstrate that the fully Zn-substituted compound shows no magnetic ordering down to 2 K, resulting in a highly spin-frustrated S = 1/2 lattice. Copyright © 2005 American Chemical Society.
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页码:13462 / 13463
页数:2
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