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J Am Chem Soc. 2019 Jun 19;141(24):9533-9536. doi: 10.1021/jacs.9b04627. Epub 2019 Jun 7.

Triple-Kagomé-Layer Slabs of Mixed-Valence Rare-Earth Ions Exhibiting Quantum Spin Liquid Behaviors: Synthesis and Characterization of Eu9MgS2B20O41.

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School of Chemistry & Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , People's Republic of China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , People's Republic of China.
Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Post Office Box 603, Beijing 100190 , People's Republic of China.
Department of Chemistry , North Carolina State University , Raleigh , North Carolina 27695-8204 , United States.
State Key Laboratory of Crystal Materials, Shandong University , Jinan 250100 , People's Republic of China.


We prepared a new rare-earth compound, Eu9MgS2B20O41 (EMSBO), and characterized its structural and physical properties. EMSBO consists of triple-Kagomé-layer slabs separated by nonmagnetic ions and groups. Within each slab, intervalence charge transfer has been found to occur between the Eu2+ and Eu3+ Kagomé layers, a new channel for quantum fluctuation of magnetic moments. The measured magnetic susceptibilities and the specific heat capacity exhibit very similar features characteristic of quantum spin liquid behaviors observed in other materials.


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