Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-06-09
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures
Scientific paper
We report the crystal structure and unconventional magnetic ordering of Cs_2Cu_3CeF_{12}, which is composed of buckled kagome lattice of Cu^{2+} ions. The exchange network in the buckled kagome lattice is fairly anisotropic, so that the present spin system can be divided into two subsystems: alternating Heisenberg chains with strong antiferromagnetic exchange interactions and dangling spins. Although the direct exchange interactions between neighboring spins were found to be all antiferromagnetic, ferromagnetic magnetic ordering of the dangling spins was observed. Magnetization exhibits a plateau at one-third of the saturation magnetization. These observations can be understood in terms of the indirect interaction between dangling spins mediated by the chain spin.
Amemiya Taiki
Fujii Kazuyuki
Morita Kenji
Ono Takafumi
Tanaka Hajime
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