202gpa下镝的高压结构相变

IF 1.2 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

High Pressure Research Pub Date : 2022-01-02 DOI:10.1080/08957959.2021.2025231

Kevin M. Hope, Christopher S. Perreault, Y. Vohra

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引用次数: 1

摘要

摘要对重镧系金属镝（Dy）的高压结构相变进行了研究采用铜作为内部x射线压力标准的金刚石砧座单元中的GPa（体积压缩）。先前指定的单斜（C2/m）相高于72 GPa已被重新检查，并根据结构改进被归属于每个细胞有16个原子的正交相（oF16）。状态方程呈现给202 GPa，并表明在72时从畸变面心立方相（hR24）向oF16相的结构相变过程中体积变化为2.3% GPa。oF16相可以被视为伪正交八层结构，其（b/c）比从理想值随着压力的增加而降低到202 GPa。将Dy的超高压结构相与镧系的其他成员进行了比较。

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High pressure structural phase transitions in Dysprosium to 202 GPa

ABSTRACT High pressure structural phase transitions in heavy lanthanide metal Dysprosium (Dy) have been studied to 202 GPa (Volume Compression ) in a diamond anvil cell employing copper as an internal x-ray pressure standard. The previously assigned monoclinic (C2/m) phase above 72 GPa has been reexamined and assigned to an orthorhombic phase with sixteen atoms per cell (oF16) based on structural refinements. The equation of state is presented to 202 GPa and indicates a volume change of 2.3% during the structural phase transition from distorted face-centered cubic (hR24) phase to oF16 phase at 72 GPa. The oF16 phase can be regarded as a pseudo-orthorhombic eight-layered structure with (b/c) ratio decreasing from an ideal value of with increasing pressure to 202 GPa. The ultrahigh pressure structural phases of Dy are compared with other members of the lanthanide series.

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来源期刊

High Pressure Research 物理-物理：综合

CiteScore

3.80

自引率

5.00%

发文量

审稿时长

2 months

期刊介绍： High Pressure Research is the leading journal for research in high pressure science and technology. The journal publishes original full-length papers and short research reports of new developments, as well as timely review articles. It provides an important forum for the presentation of experimental and theoretical advances in high pressure science in subjects such as: condensed matter physics and chemistry geophysics and planetary physics synthesis of new materials chemical kinetics under high pressure industrial applications shockwaves in condensed matter instrumentation and techniques the application of pressure to food / biomaterials Theoretical papers of exceptionally high quality are also accepted.