Novel ordering of an S=1/2 quasi-1D Ising-like antiferromagnet in magnetic field
Novel ordering of an S=1/2 quasi-1D Ising-like antiferromagnet in magnetic field
复制标题
DOI：
10.1103/physrevlett.100.057202
复制
发表时间：
2008-02-08
影响因子：
8.6
通讯作者：
Itoh, M.
中科院分区：
文献类型：
--
作者：
Kimura, S.;Takeuchi, T.;Itoh, M.
高场比热测量BaCo_2 V_2 O_8，这是一个很好的实现S= 12准一维（1D）Ising类反铁磁体，已进行了磁场高达12 T沿着链和温度下至200 mK。在磁场诱导相H_c以上发现了一个新的磁有序态，其值等于或等于3.9T。我们认为，一种新的类型的无公度秩序，这是由固有的量子效应在S = 1/2准一维类伊辛反铁磁体，出现在场诱导阶段。
High-field specific heat measurements on BaCo2V2O8, 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 similar or equal to 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.