Commensurate and incommensurate phases of the distorted triangular antiferromagnet Cs2CuBr4 studied by 133Cs NMR
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A quasi-two dimensional antiferromagnet Cs2CuBr4 is characterized as afrustrated spin system on a distorted triangular lattice with easy-plane type anisotropy.133Cs-NMR experiments on Cs2CuBr4 have been performed in the magnetic field rangeup to 15.9 T applied along b-axis, which covers the field range for the 1/3 magnetizationplateau, in order to clarify the properties of the field-induced incommensuratecommensuratetransition at both ends of the plateau. We found that NMR spectrumshows hysteresis and two phase coexistence around the transition field. We also presenta field dependence of T1^－1 at 0.5 K shows a hysteresis around each end of the plateau,indicating first order incommensurate-commensurate phase transition.
- Institute of Physics Publishingの論文
- 2007-04-00
Institute of Physics Publishing | 論文
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