A Cu2+(S=1/2) Kagome Antiferromagnet: MgxCu4-x(OH)6Cl2

被引：34

作者：

Chu, Shaoyan ^{[3
]}

McQueen, Tyrel M. ^{[1
]}

Chisnell, Robin ^{[2
]}

Freedman, Danna E. ^{[1
]}

Mueller, Peter ^{[1
]}

Lee, Young S. ^{[2
]}

Nocera, Daniel G. ^{[1
]}

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

[3] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 16期

基金：

美国国家科学基金会;

关键词：

Compendex;

D O I：

10.1021/ja1008322

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Spin-frustrated systems are one avenue for inducing macroscopic quantum states in materials. However, experimental realization of this goal has been difficult because of the lack of simple materials and, if available, the separation of the unusual magnetic properties arising from exotic magnetic states from behavior associated with chemical disorder, such as site mixing. Here we report the synthesis and magnetic properties of a new series of magnetically frustrated materials, MgxCu4-x(OH)(6)Cl-2. Because of the substantially different ligand-field chemistry of Mg2+ and Cu2+, site disorder within the kagome layers is minimized, as directly measured by X-ray diffraction. Our results reveal that many of the properties of these materials and related systems are not due to disorder of the magnetic lattice but rather reflect an unusual ground state.

引用

页码：5570 / +

页数：4

共 13 条

[1] RESONATING VALENCE BONDS - NEW KIND OF INSULATOR [J].