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 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.
Kimura
S
S
KYOKUGEN, Osaka University, Machikaneyama 1-3, Toyanaka 560-8531, Japan.
Takeuchi
T
T
Okunishi
K
K
Hagiwara
M
M
He
Z
Z
Kindo
K
K
Taniyama
T
T
Itoh
M
M