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Field-induced commensurate long-range order in the Haldane-gap system NDMAZ | | A. Zheludev
; Z. Honda
; K. katsumata
; R. feyerherm
; K. Prokes
; | | Date: |
17 Apr 2001 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | High-field neutron diffraction studies of the new quantum-disordered S=1 linear-chain antiferromagnet Ni(C$_5$H$_{14}$N$_2$)$_2$N$_3$(ClO$_4$) (NDMAZ) are reported. At T=70 mK, at a critical field $H_c=13.4$ T applied along the (013) direction, a phase transition to a commensurate Néel-like ordered state is observed. The results are discussed in the context of existing theories of quantum phase transitions in Haldane-gap antiferromagnets, and in comparions with previous studies of the related system Ni(C$_5$H$_{14}$N$_2$)$_2$N$_3$(PF$_6$). | | Source: | arXiv, cond-mat/0104311 | | Services: | Forum | Review | PDF | Favorites | |
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