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29 March 2024
 
  » arxiv » cond-mat/0403215

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Ordering and Excitations in the Field-Induced Magnetic Phase of Cs_3Cr_2Br_9
B. Grenier ; Y. Inagaki ; L.P. Regnault ; A. Wildes ; T. Asano ; Y. Ajiro ; E. Lhotel ; C. Paulsen ; T. Ziman ; J.P. Boucher ;
Date 8 Mar 2004
Subject Strongly Correlated Electrons | cond-mat.str-el
AbstractField-induced magnetic order has been investigated in detail in the interacting spin 3/2 dimer system Cs_3Cr_2Br_9. Elastic and inelastic neutron scattering measurements were performed up to H = 6 T, well above the critical field H_c1 = 1.5 T. The ordering displays incommensurabilities and a large hysteresis before a commensurate structure is reached. This structure is fully determined. Surprisingly, the lowest excitation branch never closes. Above H_c1, the gap increases slowly with field. An analysis in terms of projected pseudo-spin is given.
Source arXiv, cond-mat/0403215
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