Field-induced commensurate long-range order in the Haldane-gap system Ni(C5H14N2)(2)N-3

Authors
Zheludev, A Honda, Z Katsumata, K Feyerherm, R Prokes, K
Citation
A. Zheludev et al., Field-induced commensurate long-range order in the Haldane-gap system Ni(C5H14N2)(2)N-3, EUROPH LETT, 55(6), 2001, pp. 868-873
Citations number
29
Categorie Soggetti
Physics
Journal title
EUROPHYSICS LETTERS
ISSN journal
02955075 → ACNP
Volume
55
Issue
6
Year of publication
2001
Pages
868 - 873
Database
ISI
SICI code
0295-5075(200109)55:6<868:FCLOIT>2.0.ZU;2-N
Abstract
High-field neutron diffraction studies of the new quantum-disordered S=1 li near-chain antiferromagnet Ni(C5H14N2)(2)N-3(ClO4) (NDMAZ) are reported. At T=70 mK, at a critical field H-c = 13.4 T applied along the [013] directio n, a phase transition to a commensurate Neel-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 comparison with p revious studies of the related system Ni(C5H14N2)(2)N-3(PF6) (NDMAP).