Novel phase of solid oxygen induced by ultrahigh magnetic fields.
Novel phase of solid oxygen induced by ultrahigh magnetic fields.
复制标题
超高磁场诱导的固体氧新相。
DOI：
10.1103/physrevlett.112.247201
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发表时间：
2014
影响因子：
8.6
通讯作者：
Tatsuo C. Kobayashi
中科院分区：
文献类型：
--
作者：
T. Nomura;Y. Matsuda;S. Takeyama;A. Matsuo;K. Kindo;J. Her;Tatsuo C. Kobayashi
在高达193 T的强磁场中对固态氧α相进行了磁化强度测量和磁透射谱研究。当施加大于120 T的脉冲磁场时，观察到具有大磁滞的磁化强度的突然增加。此外，在可见光范围内，光的透射率显著增加。这些实验结果表明，一级相变发生在固态氧在双磁磁场，这不仅仅是一个磁转变。考虑到在O（2）-O（2）二聚体体系中发现的分子重排机制，我们得出结论：所观察到的场致相变是由反铁磁相的坍缩和晶体结构的变化引起的。
Magnetization measurements and magnetotransmission spectroscopy of the solid oxygen α phase were performed in ultrahigh magnetic fields of up to 193 T. An abrupt increase in magnetization with large hysteresis was observed when pulsed magnetic fields greater than 120 T were applied. Moreover, the transmission of light significantly increased in the visible range. These experimental findings indicate that a first-order phase transition occurs in solid oxygen in ultrahigh magnetic fields, and that it is not just a magnetic transition. Considering the molecular rearrangement mechanism found in the O(2)-O(2) dimer system, we conclude that the observed field-induced transition is caused by the antiferromagnetic phase collapsing and a change in the crystal structure.