Low temperature magnetism of the S 1/2 quasi one-dimensional Ising-like anitiferromagnet BaCo2V2O8

Abstract

We report the results of thermodynamic measurements on the quasi one-dimensional (1D) Ising-like antiferromagnet BaCo2 V 2O8 in the magnetic fields for H//c down to 200 mK. An appearance of a long range magnetic ordered phase is observed in the field induced region above Hc 3.9 T at temperature below 1.8 K. A peculiar incommensurate ordering, which reflects a quantum critical nature of S 1/2 1D Ising-like antiferromagnet, realizes in this ordered phase. © 2009 IOP Publishing Ltd.