Improvement of nano-polycrystalline diamond anvil cells with Zr-based bulk metallic glass cylinder for higher pressures: application to Laue-TOF diffractometer

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

High Pressure Research Pub Date : 2022-01-02 DOI:10.1080/08957959.2022.2045982

K. Yamashita, K. Komatsu, T. Ohhara, K. Munakata, T. Irifune, T. Shinmei, K. Sugiyama, T. Kawamata, H. Kagi

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引用次数: 1

Abstract

ABSTRACT Single-crystal neutron diffraction provides direct information about crystal structures such as hydrogen positions and magnetic structures. However, in-situ experiments conducted under high pressure entail technical difficulties such as attenuation correction, masking of parasitic diffraction, and limitations of sample volumes and accessible directions. For this study, we improved diamond anvil cells with a tubular frame made of Zr-based bulk metallic glass and nano-polycrystalline diamond anvils for single-crystal neutron diffraction. The thicker tubular frame was confirmed through experimentation as stably generating 4.5 GPa. Its feasibility for neutron diffraction was assessed at the Laue-TOF diffractometer at the BL18 (SENJU) beamline in the MLF J-PARC using time-resolved two-dimensional detectors covering wide solid angles. In addition to ambient-pressure measurements of NH4Cl, diffraction patterns of a high-pressure phase of ice were also collected in-situ. The obtained intensities are of refinable quality sufficient for structure analysis.

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Zr基大块金属玻璃柱对纳米多晶金刚石砧座电池高压性能的改进——在Laue TOF衍射仪上的应用

单晶中子衍射提供了关于晶体结构的直接信息，如氢的位置和磁性结构。然而，在高压下进行的原位实验存在衰减校正、寄生衍射掩蔽、样品体积和可达方向的限制等技术困难。在这项研究中，我们用zr基块状金属玻璃和纳米多晶金刚石砧制成的管状框架改进了单晶中子衍射的金刚石砧细胞。通过实验证实，较厚的管状框架可稳定产生4.5 GPa。在MLF J-PARC的BL18 (SENJU)光束线上的Laue-TOF衍射仪上，使用覆盖宽立体角的时间分辨二维探测器，评估了其中子衍射的可行性。除了NH4Cl的环境压力测量外，还收集了冰高压相的衍射图。得到的强度具有足够精细的质量，可用于结构分析。

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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.