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External Magnetic Field Effects on a Distorted Kagome Antiferromagnet



J.-H. Kim, Sungdae Ji, S.-H. Lee, B. Lake, Taner N. Yildirim, H. Nojiri, H. Kikuchi, K. Habicht, Yiming Qiu, K. Kiefer


We report bulk magnetization, and elastic and inelastic neutron scattering measurements under an external magnetic field, H, on the weakly coupled distorted kagom¿e system, Cu2(OD)3Cl. Our results show that the ordered state below 6.7 K is a canted antiferromagnet and consists of large antiferromagnetic ac-components and smaller ferromagnetic b-components. By first-principle calculations and linear spin wave analysis, we present a simple spin hamiltonian with non-uniform nearest neighbor exchange interactions resulting in a system of coupled spin trimers with a single-ion anisotropy that can qualitatively reproduce the spin dynamics of Cu2(OD)3Cl.
Physical Review Letters


frustration, kagome lattice, neutron scattering


Kim, J. , Ji, S. , Lee, S. , Lake, B. , Yildirim, T. , Nojiri, H. , Kikuchi, H. , Habicht, K. , Qiu, Y. and Kiefer, K. (2008), External Magnetic Field Effects on a Distorted Kagome Antiferromagnet, Physical Review Letters, [online],, (Accessed April 17, 2024)
Created September 2, 2008, Updated March 21, 2024