Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Inorg Chem. 2011 Sep 19;50(18):8767-73. doi: 10.1021/ic200476n. Epub 2011 Aug 18.
Single crystals of K(4)Cu(MoO(4))(3) and nonmagnetic K(4)Zn(MoO(4))(3) have been grown by the flux-growth method. K(4)Cu(MoO(4))(3) can be described as a quantum quasi-1-d antiferromagnet with correlations between neighboring Cu(2+) ions but no magnetic long-range ordering down to 0.4 K. Comparison of the structure and magnetic properties of isostructural A(4)Cu(MoO(4))(3) (A = K, Rb) allows the isolation of the effects of low dimensionality from structural distortion along the Cu-O-Mo chains. The characteristic one-dimensional behavior is hence suppressed to lower the temperature in K(4)Cu(MoO(4))(3) in comparison with that of the Rb analogue. For example, a broad peak in the specific heat is observed ~2.3 K at 0 T, which is consistent with the onset of the quantum spin liquid state.
通过熔剂生长法生长出了 K(4)Cu(MoO(4))(3) 和非磁性的 K(4)Zn(MoO(4))(3) 单晶。K(4)Cu(MoO(4))(3) 可以被描述为一种量子准一维反铁磁体，相邻 Cu(2+) 离子之间存在相关性，但在 0.4 K 以下没有磁长程有序。对结构和磁性相似的 A(4)Cu(MoO(4))(3) (A = K, Rb) 的比较允许从 Cu-O-Mo 链的结构畸变中分离出低维效应。因此，在 K(4)Cu(MoO(4))(3) 中，特征的一维行为被抑制，从而降低了与 Rb 类似物相比的温度。例如，在 0 T 下，在比热中观察到一个宽峰约 2.3 K，这与量子自旋液体状态的开始相一致。
