Development of high P–T neutron diffraction at LANSCE – toroidal anvil press, TAP-98, in the HiPPO diffractometer

Zhao, Yusheng; He, Duanwei; Qian, Jiang; Pantea, Cristian; Lokshin, Konstantin A.; Zhang, Jianzhong; Daemen, Luke L.

doi:10.1016/b978-044451979-5.50025-9

Cited by 14 publications

(3 citation statements)

References 28 publications

(18 reference statements)

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“…They did not detect the intermediate tetragonal phase between 6 and 8 GPa. To confirm the tetragonal transition observed in our X-ray diffraction experiments, we performed complementary neutron diffraction experiments on NaBD 4 using the HIPPO instrument , at the Los Alamos Neutron Science Center (LANSCE). NaBD 4 has been synthesized by reacting Na 11 BH 4 and (CH 3 ) 3 NHCl solutions in stoichiometric quantities to form (CH 3 ) 3 N 11 BH 3 .…”

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confidence: 90%

Pressure-Driven Phase Transitions in NaBH₄: Theory and Experiments

et al. 2007

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We have investigated pressure-induced structural transitions in NaBH4 through density-functional theory calculations combined with X-ray and neutron diffraction experiments. Our calculations confirm that the cubic phase is stable up to 5.4 GPa and an orthorhombic phase occurs above 8.9 GPa, as observed in X-ray diffraction experiments. Both the calculations and X-ray diffraction measurements identify an intermediate tetragonal phase that appears between 6 and 8 GPa; that is, between the cubic and orthorhombic phases. This result is also confirmed by high-pressure neutron diffraction experiments performed on NaBD4. Our calculations and X-ray diffraction measurements show that the space group of the orthorhombic phase above 8.9 GPa is Pnma and the orthorhombic phase remains stable up to 30 GPa. The calculated equations of state are in excellent agreement with experiments.

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confidence: 90%

Pressure-Driven Phase Transitions in NaBH₄: Theory and Experiments

et al. 2007

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“…The PE press has continued to evolve over the years and some 14 variants have been produced with load capacities spanning 50-400 tonnes [45]. Opposed anvils are also routinely used for TOF diffraction studies at the Lujan Center with the larger capacity (500 tonne) TAP-98 press [46,47], installed on the HIPPO beamline.…”

Section: Spallation Sourcesmentioning

confidence: 99%

Future directions in high-pressure neutron diffraction

Guthrie¹

2015

J. Phys.: Condens. Matter

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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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“…Condensed matter physics and scientific materials play an increasingly important role in technological applications which will only increase in many areas [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Structural, electronic, and magnetic properties of ZnTe doped with transition metal Mn

Brach,

Bahmad,

Benyoussef

2023

Rev. Mex. Fís.

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In this article, we examine the structure, electronic, optical, and magnetic properties of ZnTe before and after doping with the transition metal Mn. The ab initio calculations of this compound were performed using the full potential linearized extended full potential planar waveform (FP-LAPW) in the context of density functional theory (DFT) implemented in the Wien2K code. The potential for exchange and correlation was addressed by the GGA approximation. The electronic properties show that the ZnTe material exhibits semiconductor behavior before doping and it becomes semimetal after doping. The findings attained by Monte Carlo simulations display that the ZnMnTe material goes from an antiferromagnetic phase to the paramagnetic phase at the Neel temperature value TN =159.31 K.

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Development of high P–T neutron diffraction at LANSCE – toroidal anvil press, TAP-98, in the HiPPO diffractometer

Cited by 14 publications

References 28 publications

Pressure-Driven Phase Transitions in NaBH₄: Theory and Experiments

Pressure-Driven Phase Transitions in NaBH₄: Theory and Experiments

Future directions in high-pressure neutron diffraction

Structural, electronic, and magnetic properties of ZnTe doped with transition metal Mn

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Development of high P–T neutron diffraction at LANSCE – toroidal anvil press, TAP-98, in the HiPPO diffractometer

Cited by 14 publications

References 28 publications

Pressure-Driven Phase Transitions in NaBH4: Theory and Experiments

Pressure-Driven Phase Transitions in NaBH4: Theory and Experiments

Future directions in high-pressure neutron diffraction

Structural, electronic, and magnetic properties of ZnTe doped with transition metal Mn

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Product

Resources

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Pressure-Driven Phase Transitions in NaBH₄: Theory and Experiments

Pressure-Driven Phase Transitions in NaBH₄: Theory and Experiments