Quasielastic neutron scattering of brucite to analyse hydrogen transport on the atomic scale

Okuchi, Takuo; Tomioka, Naotaka; Purevjav, Narangoo; Shibata, Kaoru

doi:10.1107/s1600576718013158

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…Another major field of research where such instrumentation is required concerns hydrogen -or lithium -based functionalities in solids. Since many batteries rely on ion exchange and/or the ionic conductivity of lithium and hydrogen, determination of diffusion mechanisms in these materials is essential in understanding and improving this performance [22,44,46,37,61]. Similarly, the diffusion in ionic liquids and solvent -based electrolytes has been attracting great interest [51,4,1,62].…”

Section: Introductionmentioning

confidence: 99%

Extending MIEZE spectroscopy towards thermal wavelengths

Jochum¹,

Keller²,

Pfleiderer³

2022

Preprint

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We propose a Modulation of intensity with zero effort (MIEZE) setup for high -resolution neutron spectroscopy at momentum transfers up to 3 Å−1 ,energy transfers up to 20 meV, and an energy resolution in the µeVrange using both thermal and cold neutrons. MIEZE has two prominent advantages compared to classical neutron spin -echo. The first one is the possibility to investigate spin -depolarizing samples or samples in strong magnetic fields without loss of signal amplitude and intensity. This allows for the study of spin fluctuations in ferromagnets, and facilitates the study of samples with strong spin -incoherent scattering. The second advantage is that multi -analyzer setups can be implemented with comparatively small effort. The use of thermal neutrons increases the range of validity of the spin -echo approximation towards shorter spin -echo times. In turn, the thermal MIEZE option for greater ranges (TIGER) closes the gap between classical neutron spin -echo spectroscopy and conventional highresolution neutron spectroscopy techniques such as triple -axis, time -offlight, and back -scattering. To illustrate the feasibility of TIGER we present the details of an implementation at the beamline RESEDA at FRM II by means of an additional velocity selector, polarizer and analyzer.

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Section: Introductionmentioning

confidence: 99%

Extending MIEZE spectroscopy towards thermal wavelengths

Jochum¹,

Keller²,

Pfleiderer³

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Another major field of research where such instrumentation is required concerns hydrogen-or lithium-based functionalities in solids. Since many batteries rely on ion exchange and/or the ionic conductivity of lithium and hydrogen, determination of diffusion mechanisms in these materials is essential in understanding and improving this performance (Hester et al, 2016;Kuznetsov et al, 2021;Li et al, 2021;Klein et al, 2021;Okuchi et al, 2018). Similarly, the diffusion in ionic liquids and solvent-based electrolytes has been attracting great interest (Lundin et al, 2021;Burankova et al, 2018;Adya et al, 2007;Osti et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Extending MIEZE spectroscopy towards thermal wavelengths

Jochum¹,

Keller²,

Pfleiderer³

2022

J Appl Cryst

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A modulation of intensity with zero effort (MIEZE) setup is proposed for high-resolution neutron spectroscopy at momentum transfers up to 3 Å−1, energy transfers up to 20 meV and an energy resolution in the microelectronvolt range using both thermal and cold neutrons. MIEZE has two prominent advantages compared with classical neutron spin echo. The first is the possibility to investigate spin-depolarizing samples or samples in strong magnetic fields without loss of signal amplitude and intensity. This allows for the study of spin fluctuations in ferromagnets, and facilitates the study of samples with strong spin-incoherent scattering. The second advantage is that multi-analyzer setups can be implemented with comparatively little effort. The use of thermal neutrons increases the range of validity of the spin-echo approximation towards shorter spin-echo times. In turn, the thermal MIEZE option for greater ranges (TIGER) closes the gap between classical neutron spin-echo spectroscopy and conventional high-resolution neutron spectroscopy techniques such as triple-axis, time-of-flight and back-scattering. To illustrate the feasibility of TIGER, this paper presents the details of its implementation at the RESEDA beamline at FRM II by means of an additional velocity selector, polarizer and analyzer.

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Quasi-elastic neutron scattering studies on fast dynamics of water molecules in tetra-n-butylammonium bromide semiclathrate hydrate

Shimada

Tani

Yamada

et al. 2023

Applied Physics Letters

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The dynamics of the water molecules in tetra-n-butyl-d36-ammonium bromide semiclathrate hydrate was investigated by quasi-elastic neutron scattering (QENS). The QENS results clearly revealed a fast reorientation motion of water molecules in the temperature range of 212–278 K. The mean jump distance of hydrogen atoms was within 1.5–2.0 Å. The relaxation time of water reorientation was estimated to be 100–410 ps with an activation energy of 10.2 ± 5.8 kJ·mol−1. The activation energy was in good agreement with the cleavage energy of hydrogen bonds. Such a short relaxation time of water reorientation is possibly due to strong interaction between a bromide anion and its surrounding water molecules (similar to so-called negative hydration), which suggests a unique strategy for designing efficient, safe, and inexpensive proton conductors having the framework of semiclathrate hydrates.

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Quasielastic neutron scattering of brucite to analyse hydrogen transport on the atomic scale

Abstract: Quasielastic neutron scattering is applied to analyse the atomic scale hydrogen transport processes occurring within the crystal lattices of hydrous minerals. Two types of transport processes were observed in Mg(OH)2, which has a prototypical layered hydrogen lattice structure.

Cited by 5 publications

References 39 publications

Extending MIEZE spectroscopy towards thermal wavelengths

Extending MIEZE spectroscopy towards thermal wavelengths

Extending MIEZE spectroscopy towards thermal wavelengths

Quasi-elastic neutron scattering studies on fast dynamics of water molecules in tetra-n-butylammonium bromide semiclathrate hydrate

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