External magnetic field effects on a distorted kagome antiferromagnet

J. H. Kim, S. Ji, S. H. Lee, B. Lake, T. Yildirim, H. Nojiri, H. Kikuchi, K. Habicht, Y. Qiu, K. Kiefer

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

We report bulk magnetization, and elastic and inelastic neutron scattering measurements under an external magnetic field H on the weakly coupled distorted kagome 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-principles calculations and linear spin wave analysis, we present a simple spin Hamiltonian with nonuniform 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.

Original languageEnglish
Article number107201
JournalPhysical review letters
Volume101
Issue number10
DOIs
Publication statusPublished - 2008 Sep 2

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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