Journal
PHYSICAL REVIEW LETTERS
Volume 87, Issue 12, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.87.127203
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Two-stage spin-flop transitions are observed in the quasi-one-dimensional antiferromagnet BaCu2Si2O7. A magnetic field applied along the easy axis induces a spin-flop transition at 2.0 T followed by a second transition at 4.9 T. The magnetic susceptibility indicates the presence of Dzyaloshinskii-Moriya (DM) antisymmetric interactions between the intrachain neighboring spins. We discuss a possible mechanism whereby the geometrical competition between DM and interchain interactions, as discussed for the two-dimensional antiferromagnet La2CuO4, causes the two-stage spin-flop transitions.
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