Shores Matthew P, Nytko Emily A, Bartlett Bart M, Nocera Daniel G
Department of Chemistry, 6-335, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
J Am Chem Soc. 2005 Oct 5;127(39):13462-3. doi: 10.1021/ja053891p.
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.
报道了通式为ZnxCu4-x(OH)6Cl2（0≤x≤1）的纯阿塔卡玛矿族稀有铜矿物系列的合成及磁化率。这些化合物的结构具有反铁磁耦合Cu(II)离子的角共享三角形 kagomé晶格。我们将磁有序的起始与位于kagomé层之间的顺磁性Cu(II)离子的摩尔分数相关联，并证明完全被Zn取代的化合物在2 K以下没有磁有序，从而形成高度自旋受挫的S = 1/2晶格。
