2008/03/03 by Katsuhiro Morita, K. Morita, Midori Yano +13 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.77.043707
5 pages, 4 figures, To appear in J. Phys. Soc. Jpn. Vol. 77 No. 4
arxiv created 2008/03/03 · openalex publication_date 2008/04/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigated the crystal structure of Rb2Cu3SnF12 and its magnetic properties using single crystals. This compound is composed of Kagome layers of corner-sharing CuF6 octahedra with a 2a x 2a enlarged cell as compared with the proper Kagome layer. Rb2Cu3SnF12 is magnetically described as an S=1/2 modified Kagome antiferromagnet with four kinds of neighboring exchange interaction. From magnetic susceptibility and high-field magnetization measurements, it was found that the ground state is a disordered singlet with the spin gap, as predicted from a recent theory. Exact diagonalization for a 12-site Kagome cluster was performed to analyze the magnetic susceptibility, and individual exchange interactions were evaluated.