cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2320234-1
title: SANS experiments to investigate precipitate evolution and optimum tempering temperature of RAFM nuclear reactor steel and weld

description: This work aims to understand the formation of solute clusters and precipitate evolution in nuclear reactor steel as a function of temperature. We propose to investigate the evolution of precipitates using small angle neutron scattering (SANS) using a set of in-situ thermal ageing and a series of thermally aged samples. The information obtained from SANS, will be used to understand the precipitate evolution mechanism in RAFM reactor steels and to study the correlation existing between the tempering temperature and material strength.
DOI: 10.3535/p9g-cs3-yvb
title: Trillium L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310330-4
title: Determination of incommensurate magnetic structure in a stacked triangular quantum antiferromagnet

description: We propose neutron powder diffraction measurements to determine the magnetic structure in hexagonal Na2BaCoP2O8, which is a rare example of a frustrated easy-axis triangular antiferromagnet. In recent neutron single-crystal diffraction on WISH we observed a rich phase diagram with a succession of phases in applied longitudinal field, including a magnetization plateau phase and a phase with a field-dependent incommensurate propagation vector. In zero field the magnetic propagation vector corresponds to a three-sublattice in-plane order with an incommensurate propagation between layers, however the magnetic structure could not be solved in detail due to complexities in correcting the single crystal time-of-flight diffraction peak intensities. Here we propose to collect a powder diffraction pattern to obtain a reliable and quantitative parameterization of the zero-field magnetic structure to distinguish between competing magnetic structure models and also determine the absolute value of the ordered moment.
DOI: 10.5286/isis.e.rb2320234
title: SANS experiments to investigate precipitate evolution and optimum tempering temperature of RAFM nuclear reactor steel and weld

description: This work aims to understand the formation of solute clusters and precipitate evolution in nuclear reactor steel as a function of temperature. We propose to investigate the evolution of precipitates using small angle neutron scattering (SANS) using a set of in-situ thermal ageing and a series of thermally aged samples. The information obtained from SANS, will be used to understand the precipitate evolution mechanism in RAFM reactor steels and to study the correlation existing between the tempering temperature and material strength.
DOI: 10.3535/109-jft-d4m
title: Ruscus colchicus Yeo

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/zar-pb0-15l
title: Logfia minima (Sm.) Dumort.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310340
title: Hydrogen monitoring during fabrication of passivating contacts for application in silicon solar cells - comparison of R&D and industrial hydrogenation

description: Photovoltaics technologies based on crystalline silicon (c-Si) are key for the transition to a 100% renewable energy production. Recently, the increase of c Si solar cell efficiency relies on the integration of ‘passivating contacts’, consisting of thin films implemented at the metal/c-Si interface. Hydrogen incorporation plays a key role to passivate defects at the c-Si surface. Although virtually all c-Si solar cell structures rely on hydrogen incorporation to reduce recombination associated with a variety of limiting defects, the properties of hydrogen in Si are still poorly understood. We propose to study the hydrogen incorporation in passivating contacts with neutron reflectometry measurements. This will allow us to understand the mechanisms of hydrogen diffusion and defect passivation in these contacts, ultimately driving the fabrication of higher efficiency c-Si solar cells.
DOI: 10.5286/isis.e.rb2310340-1
title: Hydrogen monitoring during fabrication of passivating contacts for application in silicon solar cells - comparison of R&D and industrial hydrogenation

description: Photovoltaics technologies based on crystalline silicon (c-Si) are key for the transition to a 100% renewable energy production. Recently, the increase of c Si solar cell efficiency relies on the integration of ‘passivating contacts’, consisting of thin films implemented at the metal/c-Si interface. Hydrogen incorporation plays a key role to passivate defects at the c-Si surface. Although virtually all c-Si solar cell structures rely on hydrogen incorporation to reduce recombination associated with a variety of limiting defects, the properties of hydrogen in Si are still poorly understood. We propose to study the hydrogen incorporation in passivating contacts with neutron reflectometry measurements. This will allow us to understand the mechanisms of hydrogen diffusion and defect passivation in these contacts, ultimately driving the fabrication of higher efficiency c-Si solar cells.
DOI: 10.5286/isis.e.rb2320275-1
title: Determining the magnetic depth-profile and interfaces of CoFeB/Pt THz emitters using PNR

description: We propose to use polarised neutron reflectivity to determine the magnetic structure as a function of depth in ferromagnetic/non-magnetic spintronic THz emitters. Spintronic THz emitters illuminated by fs pulses of laser radiation, offer the prospect of broad-band gapless THz radiation emission with controllable polarisation. This experiment is aimed at enhancing our understanding of the mechanism of THz emission and in particular how the magnetisation profile as a function of temperature affects the amplitude of the emission. This understanding will provide the basis for further enhancements in emission efficacy.
DOI: 10.3535/hmp-pr4-vt6
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/lpe-agc-vb0
title: Astartoseris triquetra (Labill.) N. Kilian, Hand, Hadjik., Christodoulou & Bou Dagh.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310576
title: Mapping heat-induced moisture propagation in laminated engineered wood products with combined neutron and x-ray imaging

description: Engineered Wood Products (EWPs) are a promising option to replace carbon intensive steel and concrete as a sustainable alternative. Its structural performance at ambient and elevated temperatures is reliant on the composite material behaviour of EWPs, including the ability to retard fire and smoke. At elevated temperatures, the EWPs are affected by delamination resulting from the migration of moisture through panels and specifically in the vicinity of bond lines. The proposed work aims to quantity the spatio-temporal migration of moisture through EWP during transient heating using x-ray and neutron imaging, in order to assess its on the integrity of the bondline. The data obtained would complement the experimental and theoretical work undertaken as part of the PhD research into the influence of adhesive on the performance of EWPs.
DOI: 10.5286/isis.e.rb2310576-1
title: Mapping heat-induced moisture propagation in laminated engineered wood products with combined neutron and x-ray imaging

description: Engineered Wood Products (EWPs) are a promising option to replace carbon intensive steel and concrete as a sustainable alternative. Its structural performance at ambient and elevated temperatures is reliant on the composite material behaviour of EWPs, including the ability to retard fire and smoke. At elevated temperatures, the EWPs are affected by delamination resulting from the migration of moisture through panels and specifically in the vicinity of bond lines. The proposed work aims to quantity the spatio-temporal migration of moisture through EWP during transient heating using x-ray and neutron imaging, in order to assess its on the integrity of the bondline. The data obtained would complement the experimental and theoretical work undertaken as part of the PhD research into the influence of adhesive on the performance of EWPs.
DOI: 10.5286/isis.e.rb2320275
title: Determining the magnetic depth-profile and interfaces of CoFeB/Pt THz emitters using PNR

description: We propose to use polarised neutron reflectivity to determine the magnetic structure as a function of depth in ferromagnetic/non-magnetic spintronic THz emitters. Spintronic THz emitters illuminated by fs pulses of laser radiation, offer the prospect of broad-band gapless THz radiation emission with controllable polarisation. This experiment is aimed at enhancing our understanding of the mechanism of THz emission and in particular how the magnetisation profile as a function of temperature affects the amplitude of the emission. This understanding will provide the basis for further enhancements in emission efficacy.
DOI: 10.3535/pra-bgf-r2a
title: Azorella trifurcata (Gaertn.) Pers.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2320152
title: Enhancing the high-Tc spiral multiferroic phase by pressure in single-crystal YBaCuFeO5

description: YBaCuFeO5 (YBCFO) displays magnetism-driven ferroelectricity (FE) at unexpectedly high temperatures. The exceptional stability of the spiral magnetic order in YBCFO involves a non-conventional mechanism known as “spiral order by disorder”. Electrical polarization develops associated to the spiral (cycloidal) magnetic order, whose ordering temperature can be increased by more than 180 K (far beyond RT) by manipulating the Cu/Fe chemical disorder in powder samples (A. Romaguera et al., Phys. Rev. Research (2022)). However, single crystals present too much Cu/Fe order and lower spiral transition temperatures due to its fabrication method (floating-zone). Chemical pressure results in powders and the theoretical models (Science Adv. 4, eaau6386 (2018)) indicate that compressing the thickness (dt) of the bipyramidal a-b layer in YBaCuFeO5 has a strong influence on the strength of the frustrated magnetic interactions and the stabilization of the spiral phase. We will apply this strategy and will study the influence of pressure on the spiral magnetic order of an YBaCuFeO5 single crystal with Tspi=195 K (previously characterized by polarized&unpolarized neutrons). This is the highest spiral temperature reported so far in single crystals. Our SXRD and Raman characterization under pressure also suggest a possible enhancement of the thermal stability of the spiral phase.
DOI: 10.5286/isis.e.rb2320152-1
title: Enhancing the high-Tc spiral multiferroic phase by pressure in single-crystal YBaCuFeO5

description: YBaCuFeO5 (YBCFO) displays magnetism-driven ferroelectricity (FE) at unexpectedly high temperatures. The exceptional stability of the spiral magnetic order in YBCFO involves a non-conventional mechanism known as “spiral order by disorder”. Electrical polarization develops associated to the spiral (cycloidal) magnetic order, whose ordering temperature can be increased by more than 180 K (far beyond RT) by manipulating the Cu/Fe chemical disorder in powder samples (A. Romaguera et al., Phys. Rev. Research (2022)). However, single crystals present too much Cu/Fe order and lower spiral transition temperatures due to its fabrication method (floating-zone). Chemical pressure results in powders and the theoretical models (Science Adv. 4, eaau6386 (2018)) indicate that compressing the thickness (dt) of the bipyramidal a-b layer in YBaCuFeO5 has a strong influence on the strength of the frustrated magnetic interactions and the stabilization of the spiral phase. We will apply this strategy and will study the influence of pressure on the spiral magnetic order of an YBaCuFeO5 single crystal with Tspi=195 K (previously characterized by polarized&unpolarized neutrons). This is the highest spiral temperature reported so far in single crystals. Our SXRD and Raman characterization under pressure also suggest a possible enhancement of the thermal stability of the spiral phase.
DOI: 10.5286/isis.e.rb2320280-1
title: Investigating the solubility mechanism of novel ion exchange membrane in aqueous solutions

description: Membranes with fast and selective ion transport are widely used for water purification and energy conversion and storage devices. Despite various improvements, it remains challenging to design cost-effective, easily processable ion conductive membranes with well-defined pore architectures. We have recently developed a new generation of ion conducting membranes with superior performance to the current gold standard, Nafion. However aqueous stability limits practical device use. It is therefore pressing to reveal the structural changes upon water vs salt solution swelling of these new chemistries to help direct future designs that can overcome these issues. A combined Nimrod/Zoom experiment will provide structural information across a wide size scale to help this endeavour.
DOI: 10.3535/1w8-lh3-phf
title: Danae racemosa (L.) Moench

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ytt-kc4-abp
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220765-2
title: NPD study of the calcium bromide-chloride system under ammoniation conditions
DOI: 10.5286/isis.e.rb2320280
title: Investigating the solubility mechanism of novel ion exchange membrane in aqueous solutions

description: Membranes with fast and selective ion transport are widely used for water purification and energy conversion and storage devices. Despite various improvements, it remains challenging to design cost-effective, easily processable ion conductive membranes with well-defined pore architectures. We have recently developed a new generation of ion conducting membranes with superior performance to the current gold standard, Nafion. However aqueous stability limits practical device use. It is therefore pressing to reveal the structural changes upon water vs salt solution swelling of these new chemistries to help direct future designs that can overcome these issues. A combined Nimrod/Zoom experiment will provide structural information across a wide size scale to help this endeavour.
DOI: 10.3535/cjf-yse-5vl
title: Smilax azorica H.Schaef. & P.Schönfelder

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/qxr-nga-mem
title: Hybanthus Jacq.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310114-1
title: A muSR study of magnetic properties of the Meissner phase.

description: A recent LE-muSR experiment brought unexpected results challenging the standard interpretation of electromagnetic properties of the Meissner phase, i.e., properties of the bulk of superconducting samples in the Meissner state. However, these results could be an artifact caused by a low-energy tail of the stopping distribution of implanted muons. Here we propose an experiment that excludes the possibility of such an artifact, tests the previous finding, and explores it over a broader range of fields and temperatures of the Meissner phase.
DOI: 10.5286/isis.e.rb2368063
title: Muon Spin Rotation and Relaxation Study of Ferrimagnetic Sodium-rich Manganese Hexacyanoferrate Energy Material with Open Framework
DOI: 10.5286/isis.e.rb2368063-1
title: Muon Spin Rotation and Relaxation Study of Ferrimagnetic Sodium-rich Manganese Hexacyanoferrate Energy Material with Open Framework
DOI: 10.3535/x2r-hx3-fe5
title: Embothrium coccineum J. R. Forst. & G. Forst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310114
title: A muSR study of magnetic properties of the Meissner phase.

description: A recent LE-muSR experiment brought unexpected results challenging the standard interpretation of electromagnetic properties of the Meissner phase, i.e., properties of the bulk of superconducting samples in the Meissner state. However, these results could be an artifact caused by a low-energy tail of the stopping distribution of implanted muons. Here we propose an experiment that excludes the possibility of such an artifact, tests the previous finding, and explores it over a broader range of fields and temperatures of the Meissner phase.
DOI: 10.5286/isis.e.rb2310342
title: Local coordination environments and momentum distribution of hydride-ions in perovskite type oxyhydrides

description: Perovskite type oxyhydrides, ATiO3-xHx, A = Sr, Ba, with x &lt; 0.6 [1], are a novel class of hydride-ion (H-) conducting materials that may find diverse applications in the fields of catalysis, topochemical synthesis, and electrochemistry. The current understanding of the hydride-ion dynamics in these materials is primarily based on our results from quasielastic neutron scattering (QENS) and inelastic neutron scattering (INS) experiments on BaTiO3-x-yHx◻y (BTO) (◻ denoting oxygen vacancies) and SrTiO2.81H0.13◻0.06 (STO). STO showed local and fast hydride-ion dynamics, while BTO showed slow and long-range diffusion of hydride-ions. Since STO and BTO differ in the A site ion (Sr/Ba) and oxygen vacancy concentrations, these results suggest that the nature of hydride-ion dynamics is highly dependent on local structure of the oxyhydride. In order to shed more light on the local structural differences between BTO and STO, especially in regard to the vibrational properties of the hydride ions, we wish to investigate the nuclear kinetic energy (NKE) of the hydride-ions, which may affect considerably the nature of the diffusion. For that purpose, we would like to use the spectrometer VESUVIO for a neutron Compton scattering (NCS) experiment on BTO and STO, and ask for 7 days of beamtime with this instrument.
DOI: 10.5286/isis.e.rb2310342-1
title: Local coordination environments and momentum distribution of hydride-ions in perovskite type oxyhydrides

description: Perovskite type oxyhydrides, ATiO3-xHx, A = Sr, Ba, with x &lt; 0.6 [1], are a novel class of hydride-ion (H-) conducting materials that may find diverse applications in the fields of catalysis, topochemical synthesis, and electrochemistry. The current understanding of the hydride-ion dynamics in these materials is primarily based on our results from quasielastic neutron scattering (QENS) and inelastic neutron scattering (INS) experiments on BaTiO3-x-yHx◻y (BTO) (◻ denoting oxygen vacancies) and SrTiO2.81H0.13◻0.06 (STO). STO showed local and fast hydride-ion dynamics, while BTO showed slow and long-range diffusion of hydride-ions. Since STO and BTO differ in the A site ion (Sr/Ba) and oxygen vacancy concentrations, these results suggest that the nature of hydride-ion dynamics is highly dependent on local structure of the oxyhydride. In order to shed more light on the local structural differences between BTO and STO, especially in regard to the vibrational properties of the hydride ions, we wish to investigate the nuclear kinetic energy (NKE) of the hydride-ions, which may affect considerably the nature of the diffusion. For that purpose, we would like to use the spectrometer VESUVIO for a neutron Compton scattering (NCS) experiment on BTO and STO, and ask for 7 days of beamtime with this instrument.
DOI: 10.3535/2h4-0s1-dts
title: Dactylorhiza incarnata (L.) Soó

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/dax-yjm-95s
title: Azorella nivalis Phil.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220024
title: Solid state spectra and phase transitions in the C3Hx hydrocarbons
DOI: 10.5286/isis.e.rb2220024-1
title: Solid state spectra and phase transitions in the C3Hx hydrocarbons
DOI: 10.5286/isis.e.rb2220177-2
title: Crystalline-electric-field excitations of a Pr-based antiferromagnet with competing interactions
DOI: 10.3535/2jq-y0c-b2s
title: Myrsine africana L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/v9v-ngt-ja9
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220177
title: Crystalline-electric-field excitations of a Pr-based antiferromagnet with competing interactions
DOI: 10.5286/isis.e.rb2220201
title: μSR investigation of a rhombus lattice-based system: LiYbSiO4
DOI: 10.5286/isis.e.rb2220201-1
title: μSR investigation of a rhombus lattice-based system: LiYbSiO4
DOI: 10.3535/gfp-2hd-6x5
title: Quercus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310610-1
title: Neutron diffraction residual stress analysis of thermal sprayed thick coatings for hardfacing applications

description: In the current transition towards NewZero 2050, the current fossil fuel-based power plants are being used with higher flexibility due to the intermittent nature of wind and solar renewable energy sources, posing components to excessive stress causing failures and downtime. We have developed a new Stellite 6 coating for power plant boilers that is exceptionally thick (1 mm) for the technique it has been produced with (thermal spray). Therefore, we propose to investigate the through-thickness residual stress profile of this coating, to better understand its relation with microhardness and role in early failure, potentially enhancing components lifetime and contributing to enable the transition to NetZero. Engin-X and the resolution and accuracy of neutron scattering will yield the high-quality data that can enable our research.
DOI: 10.5286/isis.e.rb2320075
title: Interdiffusion of polymers in waterborne polymer colloids

description: Waterborne latex films, obtained from the dispersions of latex particles are of particular interest due to their applications in painting, coating, adhesive industries, etc. The film formation from latex particles (size range ~ 50-150 nm) involves three sequential overlapping steps: water evaporation followed by the increase of particle concentration and particle ordering, particle deformation, and particle coalescence with polymer chain interdiffusion across boundaries. However, abrupt water penetration inside the films restricting their lifespan and deteriorating the shining of the coating, limiting their uses. The inclusion of hydrophilic hairy layers to the latex particles leads to an interstitial phase in the latex film, which acts as a diffusion barrier for the interdiffusion of polymer chains between particles and also as a medium to transport water into the film and enhances the properties of the film. In this study, using SANS and TR-SANS, we will resolve the structure of individual segments of partially deuterated polymer latex particles (protonated core and deuterated shell) at different contrast conditions (in solution) and interdiffusion of polymers in polymer latex films, prepared from the mixing of D- and H-type latex particles. The kinetics of D/H mixing in the films will be initiated using elevated temperatures (40-70 oC). The rate of mixing between D/H type particles will be evaluated from the exponential/logarithmic decay in the scattering intensity.