title: Novel ordering of an S = 1/2 quasi-1d Ising-like antiferromagnet in magnetic field.
abstract: 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.
authors: KYOKUGEN, Osaka University, Machikaneyama 1-3, Toyanaka 560-8531, Japan.
authors: S
authors: S
authors: Kimura
authors: T
authors: T
authors: Takeuchi
authors: K
authors: K
authors: Okunishi
authors: M
authors: M
authors: Hagiwara
authors: Z
authors: Z
authors: He
authors: K
authors: K
authors: Kindo
authors: T
authors: T
authors: Taniyama
authors: M
authors: M
authors: Itoh