Novel ordering of an S = 1/2 quasi-1d Ising-like antiferromagnet in magnetic field

High-field specific heat measurements on BaCo(2)V(2)O(8), which is a good realization of an S=1/2 quasi-one-dimensional (1D) Ising-like antifferomagnet, have been performed in magnetic fields up to 12 T along the chain and at temperature down to 200 mK. We have found a new magnetic ordered state in...

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Bibliographic Details
Published in:Physical review letters 2008-02, Vol.100 (5), p.057202-057202, Article 057202
Main Authors: Kimura, S, Takeuchi, T, Okunishi, K, Hagiwara, M, He, Z, Kindo, K, Taniyama, T, Itoh, M
Format: Article
Language:English
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Summary:High-field specific heat measurements on BaCo(2)V(2)O(8), which is a good realization of an S=1/2 quasi-one-dimensional (1D) Ising-like antifferomagnet, have been performed in magnetic fields up to 12 T along the chain and at temperature down to 200 mK. We have found a new magnetic ordered state in the field-induced phase above H(c) approximately 3.9 T. We suggest that a novel type of the incommensurate order, which is caused by the quantum effect inherent in the S=1/2 quasi-1D Ising-like antiferromagnet, appears in the field-induced phase.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.057202