Physical properties of liquid oxygen under ultrahigh magnetic fields
Physical properties of liquid oxygen under ultrahigh magnetic fields
复制标题
超高磁场下液氧的物理性质
DOI：
10.1103/physrevb.104.224423
复制
发表时间：
2021
影响因子：
3.7
通讯作者：
Kobayashi T. C.
中科院分区：
文献类型：
--
作者：
Nomura T.;Ikeda A.;Gen M.;Matsuo A.;Kindo K.;Kohama Y.;Matsuda Y. H.;Zherlitsyn S.;Wosnitza J.;Tsuda H.;Kobayashi T. C.
用超声测量方法研究了90 T以下液氧的声学特性。我们观察到，施加磁场时，声速单调减小，声衰减渐近增大。这种不寻常的衰减是零场值的20倍，表明局部分子排列的强烈波动。我们假设观测到的波动与液-液过渡或交叉有关，从小磁化到大磁化，其特征是局部结构重排。为了研究液氧的高场特性，我们通过声学、膨胀、磁和光学技术进行了高达180 T的单匝线圈实验。我们只观察到这些性质的单调变化，反映了在我们的实验条件下没有提出的液-液转变。
We studied the acoustic properties of liquid oxygen up to 90 T by means of ultrasound measurements. We observed a monotonic decrease of the sound velocity and an asymptotic increase of the sound attenuation when applying magnetic fields. The unusual attenuation, twenty times as large as the zero-field value, suggests strong fluctuations of the local molecular arrangement. We assume that the observed fluctuations are related to a liquid-liquid transition or crossover, from a small-magnetization to a large-magnetization liquid, which is characterized by a local-structure rearrangement. To investigate higher-field properties of liquid oxygen, we performed single-turn-coil experiments up to 180 T by means of the acoustic, dilatometric, magnetic, and optical techniques. We observed only monotonic changes of these properties, reflecting the absence of the proposed liquid-liquid transition in our experimental conditions.