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Haberl B, Guthrie M, Boehler R. Advancing neutron diffraction for accurate structural measurement of light elements at megabar pressures. Sci Rep 2023; 13:4741. [PMID: 36959351 PMCID: PMC10036630 DOI: 10.1038/s41598-023-31295-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/09/2023] [Indexed: 03/25/2023] Open
Abstract
Over the last 60 years, the diamond anvil cell (DAC) has emerged as the tool of choice in high pressure science because materials can be studied at megabar pressures using X-ray and spectroscopic probes. In contrast, the pressure range for neutron diffraction has been limited due to low neutron flux even at the strongest sources and the resulting large sample sizes. Here, we introduce a neutron DAC that enables break-out of the previously limited pressure range. Key elements are ball-bearing guides for improved mechanical stability, gem-quality synthetic diamonds with novel anvil support and improved in-seat collimation. We demonstrate a pressure record of 1.15 Mbar and crystallographic analysis at 1 Mbar on the example of nickel. Additionally, insights into the phase behavior of graphite to 0.5 Mbar are described. These technical and analytical developments will further allow structural studies on low-Z materials that are difficult to characterize by X-rays.
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Affiliation(s)
- Bianca Haberl
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
| | - Malcolm Guthrie
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Reinhard Boehler
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
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Drewitt JWE. Liquid structure under extreme conditions: high-pressure x-ray diffraction studies. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:503004. [PMID: 34544063 DOI: 10.1088/1361-648x/ac2865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
Under extreme conditions of high pressure and temperature, liquids can undergo substantial structural transformations as their atoms rearrange to minimise energy within a more confined volume. Understanding the structural response of liquids under extreme conditions is important across a variety of disciplines, from fundamental physics and exotic chemistry to materials and planetary science.In situexperiments and atomistic simulations can provide crucial insight into the nature of liquid-liquid phase transitions and the complex phase diagrams and melting relations of high-pressure materials. Structural changes in natural magmas at the high-pressures experienced in deep planetary interiors can have a profound impact on their physical properties, knowledge of which is important to inform geochemical models of magmatic processes. Generating the extreme conditions required to melt samples at high-pressure, whilst simultaneously measuring their liquid structure, is a considerable challenge. The measurement, analysis, and interpretation of structural data is further complicated by the inherent disordered nature of liquids at the atomic-scale. However, recent advances in high-pressure technology mean that liquid diffraction measurements are becoming more routinely feasible at synchrotron facilities around the world. This topical review examines methods for high pressure synchrotron x-ray diffraction of liquids and the wide variety of systems which have been studied by them, from simple liquid metals and their remarkable complex behaviour at high-pressure, to molecular-polymeric liquid-liquid transitions in pnicogen and chalcogen liquids, and density-driven structural transformations in water and silicate melts.
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Affiliation(s)
- James W E Drewitt
- School of Physics, University of Bristol, H H Wills Physics Laboratory, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
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Guthrie M. Future directions in high-pressure neutron diffraction. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:153201. [PMID: 25789450 DOI: 10.1088/0953-8984/27/15/153201] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The ability to manipulate structure and properties using pressure has been well known for many centuries. Diffraction provides the unique ability to observe these structural changes in fine detail on lengthscales spanning atomic to nanometre dimensions. Amongst the broad suite of diffraction tools available today, neutrons provide unique capabilities of fundamental importance. However, to date, the growth of neutron diffraction under extremes of pressure has been limited by the weakness of available sources. In recent years, substantial government investments have led to the construction of a new generation of neutron sources while existing facilities have been revitalized by upgrades. The timely convergence of these bright facilities with new pressure-cell technologies suggests that the field of high-pressure (HP) neutron science is on the cusp of substantial growth. Here, the history of HP neutron research is examined with the hope of gleaning an accurate prediction of where some of these revolutionary capabilities will lead in the near future. In particular, a dramatic expansion of current pressure-temperature range is likely, with corresponding increased scope for extreme-conditions science with neutron diffraction. This increase in coverage will be matched with improvements in data quality. Furthermore, we can also expect broad new capabilities beyond diffraction, including in neutron imaging, small angle scattering and inelastic spectroscopy.
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Affiliation(s)
- M Guthrie
- European Spallation Source, ESS AB, SE-22100 Lund Sweden
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Liu Z, Li M, Han Q, Yang Y, Wang B, Sui Z. Numerical simulation and experiment on multilayer stagger-split die. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:053903. [PMID: 23742562 DOI: 10.1063/1.4804159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A novel ultra-high pressure device, multilayer stagger-split die, has been constructed based on the principle of "dividing dies before cracking." Multilayer stagger-split die includes an encircling ring and multilayer assemblages, and the mating surfaces of the multilayer assemblages are mutually staggered between adjacent layers. In this paper, we investigated the stressing features of this structure through finite element techniques, and the results were compared with those of the belt type die and single split die. The contrast experiments were also carried out to test the bearing pressure performance of multilayer stagger-split die. It is concluded that the stress distributions are reasonable and the materials are utilized effectively for multilayer stagger-split die. And experiments indicate that the multilayer stagger-split die can bear the greatest pressure.
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Affiliation(s)
- Zhiwei Liu
- Dieless Forming Technology Center, Jilin University, Changchun 130025, China
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Dammak H, Antoshchenkova E, Hayoun M, Finocchi F. Isotope effects in lithium hydride and lithium deuteride crystals by molecular dynamics simulations. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:435402. [PMID: 23034812 DOI: 10.1088/0953-8984/24/43/435402] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Molecular dynamics (MD) simulations have been carried out to study isotope effects in lithium hydride and lithium deuteride crystals. Quantum effects on nuclear motion have been included through a quantum thermal bath (QTB). The interatomic forces were described either within the density functional theory (DFT) in the generalized gradient approximation (GGA) or by the phenomenological approach using the shell model. For both models, the isotopic shift in the lattice parameter can be successfully predicted by QTB-MD simulations. The slope of the experimental isotopic shift in pressure is satisfactorily reproduced by QTB-MD within DFT-GGA, in contrast to both density functional perturbation theory and QTB-MD with the shell model. We have analyzed the reasons for these discrepancies through the vibrational densities of states and the isotopic shifts in bulk modulus. The results illustrate the importance of anharmonic contributions to vibrations and to the isotopic pressure shift between LiH and LiD.
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Affiliation(s)
- Hichem Dammak
- Laboratoire Structures, Propriétés et Modélisation des Solides, CNRS UMR 8580, Ecole Centrale Paris, Châtenay-Malabry, France
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Fang J, Bull CL, Loveday JS, Nelmes RJ, Kamenev KV. Strength analysis and optimisation of double-toroidal anvils for high-pressure research. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:093902. [PMID: 23020389 DOI: 10.1063/1.4746993] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We used the finite element method for stress and deformation analysis of the large sample volume double-toroidal anvil and gasket assembly used with the Paris-Edinburgh press for neutron scattering, in order to investigate the failure of this assembly observed repeatedly in experiments at a load of approximately 240 tonnes. The analysis is based on a new approach to modelling an opposed anvil device working under extreme stress conditions. The method relies on use of experimental data to validate the simulation in the absence of the material property data available for high pressure conditions. Using this method we analysed the stress distribution on the surface and in the bulk of the double-toroidal anvils, and we conclude that the failure occurs on the surface of the anvil and that it is caused by the tensile stress. We also use the model to show possible ways of optimising the anvil design in order to extend its operational pressure range.
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Affiliation(s)
- J Fang
- School of Engineering and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
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Fang J, Bull CL, Hamidov H, Loveday JS, Gutmann MJ, Nelmes RJ, Kamenev KV. A rotator for single-crystal neutron diffraction at high pressure. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2010; 81:113901. [PMID: 21133480 DOI: 10.1063/1.3494606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present a modified Paris-Edinburgh press which allows rotation of the anvils and the sample under applied load. The device is designed to overcome the problem of having large segments of reciprocal space obscured by the tie rods of the press during single-crystal neutron-scattering experiments. The modified press features custom designed hydraulic bearings and provides controls for precision rotation and positioning. The advantages of using the device for increasing the number of measurable reflections are illustrated with the results of neutron-diffraction experiments on a single crystal of germanium rotated under a load of 70 tonnes.
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Affiliation(s)
- J Fang
- School of Engineering and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
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Hattori T, Katayama Y, Machida A, Otomo T, Suzuya K. For high-pressure experiments using total scattering spectrometer NOVA at J-PARC. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/215/1/012024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Zimmermann MV, Nowak R, Gu GD, Mennerich C, Klauss HH, Hücker M. A clamp-type pressure cell for high energy x-ray diffraction. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:033906. [PMID: 18377024 DOI: 10.1063/1.2889162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present a clamp-type pressure cell for high energy x-ray diffraction. The pressure cell was specifically designed for studies of weak superstructure reflections at low temperatures in transition metal oxides, resulting from, e.g., charge density modulations. Using a photon energy of E=100 keV, the bulk properties of single crystals with a volume of typically 2-5 mm3 can be studied in transmission geometry. To demonstrate the performance of the pressure cell, we present data on the charge stripe order in the high-temperature superconductor La1.875Ba0.125CuO4.
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Affiliation(s)
- M V Zimmermann
- Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron, 22603 Hamburg, Germany
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Novaković N, Radisavljević I, Colognesi D, Ostojić S, Ivanović N. First principle calculations of alkali hydride electronic structures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2007; 19:406211. [PMID: 22049110 DOI: 10.1088/0953-8984/19/40/406211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Electronic structure, volume optimization, bulk moduli, elastic constants, and frequencies of the transversal optical vibrations in LiH, NaH, KH, RbH, and CsH are calculated using the full potential augmented plane wave method, extended with local orbitals, and the full potential linearized augmented plane wave method. The obtained results show some common features in the electronic structure of these compounds, but also clear differences, which cannot be explained using simple empirical trends. The differences are particularly prominent in the electronic distributions and interactions in various crystallographic planes. In the light of these findings we have elaborated some selected experimental results and discussed several theoretical approaches frequently used for the description of various alkali hydride properties.
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Affiliation(s)
- N Novaković
- Institute for Nuclear Sciences 'VINČA', POB 522, 11001 Belgrade, Serbia
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Barrera G, Colognesi D, Mitchell P, Ramirez-Cuesta A. LDA or GGA? A combined experimental inelastic neutron scattering and ab initio lattice dynamics study of alkali metal hydrides. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2005.04.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Morón MC, Palacio F, Clark SM. Pressure-induced structural phase transitions in the AMnF4 series (A=Cs, Rb, K) studied by synchrotron x-ray powder diffraction: Correlation between hydrostatic and chemical pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7052-7061. [PMID: 9984323 DOI: 10.1103/physrevb.54.7052] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bellaïche L, Lévy B. Calculation of the self-consistent-field electronic wave functions of crystals using Wannier-type functions: The case of LiH. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:1575-1583. [PMID: 9986001 DOI: 10.1103/physrevb.54.1575] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ghandehari K, Luo H, Ruoff AL, Trail SS, DiSalvo FJ. New high pressure crystal structure and equation of state of cesium hydride to 253 GPa. PHYSICAL REVIEW LETTERS 1995; 74:2264-2267. [PMID: 10057884 DOI: 10.1103/physrevlett.74.2264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Besson JM, Pruzan P, Klotz S, Hamel G, Silvi B, Nelmes RJ, Loveday JS, Wilson RM, Hull S. Variation of interatomic distances in ice VIII to 10 GPa. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:12540-12550. [PMID: 10010155 DOI: 10.1103/physrevb.49.12540] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nelmes RJ, Loveday JS, Wilson RM, Besson JM, Pruzan P, Klotz S, Hamel G, Hull S. Neutron diffraction study of the structure of deuterated ice VIII to 10 GPa. PHYSICAL REVIEW LETTERS 1993; 71:1192-1195. [PMID: 10055473 DOI: 10.1103/physrevlett.71.1192] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Nelmes RJ, Loveday JS, Allan DR, Besson JM, Hamel G, Grima P, Hull S. Neutron- and x-ray-diffraction measurements of the bulk modulus of boron. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:7668-7673. [PMID: 10004773 DOI: 10.1103/physrevb.47.7668] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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