Search for a ferroelectrically ordered form of ice VII by neutron diffraction under high pressure and high electric field
Search for a ferroelectrically ordered form of ice VII by neutron diffraction under high pressure and high electric field
复制标题
通过高压高电场下的中子衍射寻找冰 VII 的铁电有序形式
DOI：
10.1103/physrevb.99.174201
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发表时间：
2019
影响因子：
3.7
通讯作者：
and Kagi H.
中科院分区：
文献类型：
--
作者：
Yamane R.;Komatsu K.;Maynard-Casely H.E.;Lee S.;Booth N.;and Kagi H.
在6.2 GPa和10.2kV/mm压力下进行了冰VII的中子衍射实验，研究了强电场作用下冰VII的潜在铁电有序结构。为了实现这一点，我们开发了一种高压室组件，允许在高压和高电场条件下进行粉末中子衍射。然而，在这些条件下所获得的随后观察到的衍射图并不能充分证明所提出的冰VII的铁电有序结构。我们从高压回路测量估计了在应用条件下冰VII中氢的有序程度，并讨论了未来探测铁电有序结构的可能性。
Neutron diffraction experiments of ice VII at pressures up to 6.2 GPa and 10.2 kV/mm were conducted to investigate the potential ferroelectrically ordered structure of ice VII induced by a high electric field. To accomplish this, we developed a high-pressure cell assembly to allow for powder neutron diffraction to be conducted under both high-pressure and high-electric field conditions. However, the subsequent observed diffraction patterns takenin situat these conditions do not show sufficient evidence of the proposed ferroelectrically ordered structure of ice VII. We estimate the degree of the hydrogen ordering in ice VII under the applied conditions from high-pressureloop measurements, and discuss the future possibilities of detecting the ferroelectrically ordered structure.