Field-induced order-disorder transition in the quasi-one-dimensional anisotropic antiferromagnet Ba Co 2 V 2 O 8
Field-induced order-disorder transition in the quasi-one-dimensional anisotropic antiferromagnet Ba Co 2 V 2 O 8
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DOI：
10.1103/physrevb.72.172403
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发表时间：
2005-11
影响因子：
3.7
通讯作者：
Zhangzhen He;T. Taniyama;T. Kyōmen;M. Itoh
中科院分区：
文献类型：
--
作者：
Zhangzhen He;T. Taniyama;T. Kyōmen;M. Itoh
在Néel温度以下，沿磁轴方向观察到准一维各向异性自旋链反铁磁锡磁场的有序-无序转变。我们通过磁测量和热容测量在平面上构造了相图，发现有序-无序相变的相界可以用平均场幂定律来描述。我们还认为，在高于临界值的磁场中，可以观察到从三维Néel有序回到一维无序相的量子临界行为。
Order-disorder transition is observed in the quasi-one-dimensional anisotropic spin chain antiferromagnetin magnetic fields along the magnetic easyaxis below the Néel temperature. We construct the phase diagram in theplane through magnetic and heat capacity measurements and find that the phase boundary of the order-disorder transition can be described in terms of a mean-field power law. We also suggest that quantum critical behavior from three-dimensional Néel ordering back into a one-dimensional disordered phase is observed in magnetic fields above a critical value of.