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Two-stage spin-flop transitions in S = 1/2 antiferromagnetic spin chain BaCu_2Si_2O_7 | | I. Tsukada
; J. Takeya
; T. Masuda
; K. Uchinokura
; | | Date: |
16 Jul 2001 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | CRIEPI) T. Masuda, K. Uchinokura (Univ. of Tokyo | | Abstract: | Two-stage spin-flop transitions are observed the in quasi-one-dimensional antiferromagnet, BaCu${}_2$Si${}_2$O${}_7$. 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 La${}_2$CuO${}_4$, causes the two-stage spin-flop transitions. | | Source: | arXiv, cond-mat/0107328 | | Services: | Forum | Review | PDF | Favorites | |
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