cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e/isis.e.rb2400051-1
title: The Magnetic Structure of G-type charge and orbital ordered Manganites

description: The hole-doped manganite phase diagram RE1-xAxMnO3 (oxidation states: RE = 3+, A = 2+) has been extensively studied over the last 40 years on account of both fundamental interest in charge, orbital and magnetic ordering, and technologically relevant properties such as colossal magnetoresistance. Despite extensive investigations, questions concerning the underlying structural and electronic ordering at key doping levels persist. This is in part due to the intrinsic electronic phase separation that occurs around x = 3/8, obfuscating the analysis of diffraction data. Recently we have had significant success in using the quadruple perovskites AMn7O12 as a prototype system to reveal novel ordered states, including an orbital order with charge disorder phase (A = Ca0.6Na0.4) and an unprecedented G-type orbital and charge ordering (A = Hg2+). However, the magnetic ordering associated with the latter has remained elusive due to phase segregation that is evident below the ordering temperature. Here we propose to investigate a lightly substituted sample Hg0.7Na0.3Mn7O12 which we have characterised carefully down to 10 K on the high-resolution powder diffractometer ID22, ESRF. Our sample displays the same electronic ordering as HgMn7O12, but without any phase separation. Our results will allow us to elucidate the magnetic ordering associated with G-type orbital ordering, adding a greater understanding of the electronically competing phases in the manganite phase diagram.
DOI: 10.5286/isis.e/isis.e.rb2410149
title: Efficient production of H2 from water and ethanol through selective reforming

description: It is essential to develop new routes for H2 production with less amount of C1 emission. We created a new route for selective ethanol reforming towards H2 and acetic acid at low temperature, preserving most of the carbon species in value-added liquid products. By precisely tailoring the atomic Pt/Ir species on α-MoC, we successfully preserve the C-C bond in ethanol and promote the reforming of C-H bond in -CH2- with the abundant -OH groups at the metal-support interface with high activity and selectivity. We request 5 days on TOSCA to study the binding dynamics of ethanol and intermediates over the exceptional catalyst (PtIr/MoC). The proposed study will investigate the vibrational spectroscopy of the catalyst, adsorption of guest ethanol and H2O molecules and any possible reaction intermediates on active sites. This study aims to reveal the role of Pt/Ir sites in binding and activation of guest molecules, giving key insights into the efficient H2 production.
DOI: 10.5286/isis.e/isis.e.rb2410149-1
title: Efficient production of H2 from water and ethanol through selective reforming

description: It is essential to develop new routes for H2 production with less amount of C1 emission. We created a new route for selective ethanol reforming towards H2 and acetic acid at low temperature, preserving most of the carbon species in value-added liquid products. By precisely tailoring the atomic Pt/Ir species on α-MoC, we successfully preserve the C-C bond in ethanol and promote the reforming of C-H bond in -CH2- with the abundant -OH groups at the metal-support interface with high activity and selectivity. We request 5 days on TOSCA to study the binding dynamics of ethanol and intermediates over the exceptional catalyst (PtIr/MoC). The proposed study will investigate the vibrational spectroscopy of the catalyst, adsorption of guest ethanol and H2O molecules and any possible reaction intermediates on active sites. This study aims to reveal the role of Pt/Ir sites in binding and activation of guest molecules, giving key insights into the efficient H2 production.
DOI: 10.3535/as4-me2-058
title: Deschampsia P.Beauv.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ecf-1ll-7wa
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e/isis.e.rb2390171
title: Thermal transmission measurements of high density polyethylene and different grades of nuclear graphite
DOI: 10.5286/isis.e/isis.e.rb2390171-1
title: Thermal transmission measurements of high density polyethylene and different grades of nuclear graphite
DOI: 10.5286/isis.e/isis.e.rb2400051
title: The Magnetic Structure of G-type charge and orbital ordered Manganites

description: The hole-doped manganite phase diagram RE1-xAxMnO3 (oxidation states: RE = 3+, A = 2+) has been extensively studied over the last 40 years on account of both fundamental interest in charge, orbital and magnetic ordering, and technologically relevant properties such as colossal magnetoresistance. Despite extensive investigations, questions concerning the underlying structural and electronic ordering at key doping levels persist. This is in part due to the intrinsic electronic phase separation that occurs around x = 3/8, obfuscating the analysis of diffraction data. Recently we have had significant success in using the quadruple perovskites AMn7O12 as a prototype system to reveal novel ordered states, including an orbital order with charge disorder phase (A = Ca0.6Na0.4) and an unprecedented G-type orbital and charge ordering (A = Hg2+). However, the magnetic ordering associated with the latter has remained elusive due to phase segregation that is evident below the ordering temperature. Here we propose to investigate a lightly substituted sample Hg0.7Na0.3Mn7O12 which we have characterised carefully down to 10 K on the high-resolution powder diffractometer ID22, ESRF. Our sample displays the same electronic ordering as HgMn7O12, but without any phase separation. Our results will allow us to elucidate the magnetic ordering associated with G-type orbital ordering, adding a greater understanding of the electronically competing phases in the manganite phase diagram.
DOI: 10.5286/isis.e/isis.e.rb2490225-1
title: Probing CEF levels of LiYbSiO4: A rhombus lattice-based compound
DOI: 10.34816/ifao.archives.232815
title: SAQQARA_nb_1994_03285

description: Référence : nb_1994_03285<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/lx4-vmp-3cr
title: Poa alpina L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/pjv-mn7-e5g
title: Crataegus azarolus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e/isis.e.rb2420275-1
title: Magnetic structural studies of inverse spinel Co2SnO4 single crystal

description: The compound Co2SnO4 is an inverse spinel and it can be expressed as "Co2+(Co2+/Sn4+)O4. It exhibits a ferrimagnetic transition with a compensate transition around 11K due to two Co2+ (tetrahedral and octahedral) sublattices. The B site is partially occupied by non-magnetic Sn4+ and the magnetism is associated with network of Co2+ ions distributed over the A site and half of the B sites. We have grown the Co2SnO4 single crystal of size 1mm3 for the first-time using flux technique and it is ideal system to measure the Co2+ magnetism with non-magnetic Sn on the B site. Our single crystal sample is characterised using single crystal x-ray and magnetometry. Recently, we have measured the diffused scattering at room temperature on the SXD beam line using Xpress time. The experiment was successful and now we would like to study the Co2+ magnetism at low temperature.
DOI: 10.5286/isis.e/isis.e.rb2469002
title: How ionomer influences ink properties during the preparation of a catalyst layer for a proton exchange membrane fuel cell (PEMFC)

description: At the catalyst layers of a proton exchange membrane fuel cell (PEMFC), the key electrochemical reactions of a hydrogen powered vehicle take place, where hydrogen and oxygen are converted into electricity and water. Improvements at the catalyst layers to optimize the electrochemical reactions will directly result in an increased performance of the PEMFC system. The catalyst layers are made through mixing the catalyst (platinum on carbon) with an ionic polymer (ionomer) in an alcohol and water. This slurry (ink) is mixed, coated as a thin layer, and finally dried to give rise to the catalyst layer. Then the anode and cathode catalyst layers are pressed at an elevated temperature to the membrane, which gives rise to the final catalyst coated membrane (CCM). All the processing steps have a strong influence on the final catalyst layer structure and electrochemical performance. Especially, the state of the materials within the ink. Currently, the interaction of materials within the ink is unkwown. Therefore, using CV-SANS would be desired, so that the interactions between the materials within the ink can be understood, which will help to improve the electrochemistry of the PEM fuel cell.
DOI: 10.5286/isis.e/isis.e.rb2469002-1
title: How ionomer influences ink properties during the preparation of a catalyst layer for a proton exchange membrane fuel cell (PEMFC)

description: At the catalyst layers of a proton exchange membrane fuel cell (PEMFC), the key electrochemical reactions of a hydrogen powered vehicle take place, where hydrogen and oxygen are converted into electricity and water. Improvements at the catalyst layers to optimize the electrochemical reactions will directly result in an increased performance of the PEMFC system. The catalyst layers are made through mixing the catalyst (platinum on carbon) with an ionic polymer (ionomer) in an alcohol and water. This slurry (ink) is mixed, coated as a thin layer, and finally dried to give rise to the catalyst layer. Then the anode and cathode catalyst layers are pressed at an elevated temperature to the membrane, which gives rise to the final catalyst coated membrane (CCM). All the processing steps have a strong influence on the final catalyst layer structure and electrochemical performance. Especially, the state of the materials within the ink. Currently, the interaction of materials within the ink is unkwown. Therefore, using CV-SANS would be desired, so that the interactions between the materials within the ink can be understood, which will help to improve the electrochemistry of the PEM fuel cell.
DOI: 10.34816/ifao.archives.232816
title: SAQQARA_nb_1994_03287

description: Référence : nb_1994_03287<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/xj9-q3j-4fy
title: Poaceae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e/isis.e.rb2310437-1
title: Magnetically frustrated dynamics on the Cairo pentagonal lattice

description: We have synthesized a large high quality 2.35 g single crystal of Bi2Fe4O9, a quasi two-dimensional Cairo pentagonal lattice, a new motif in geometrical frustration. Bi2Fe4O9 shows AF order for T &lt; 245 K while θCW = -1670 K, indicating strong frustration. Above Tn an unusual emergent state exists. In order to understand the emergent state is imperative that ground state is well characterised. Previous studies on a smaller single crystal and powder samples by other groups found spin waves in the energy range 5-100 meV with one model indicating a strong need for anisotropy while the other does not. Two of the spins couple strongly (24 meV) and the others less strong (3-6 meV), with all couplings found to be AFM. We have independently investigated the low-energy spin wave excitations at 10 K with high energy resolution using CAMEA and EIGER at PSI, and have uncovered significant differences to previous work. In particular we observe a clear double spin gap. We now wish to extend our inelastic neutron scattering studies to access higher energy spin waves across S(Q, ω) in the ordered phase and the disordered phases. This will improve the understanding of the Hamiltonian of this system in order and address the effect of geometrical frustration in this unique pentagonal system. MERLIN is ideally suited to probe the subtle effects found in this compound.
DOI: 10.5286/isis.e/isis.e.rb2420275
title: Magnetic structural studies of inverse spinel Co2SnO4 single crystal

description: The compound Co2SnO4 is an inverse spinel and it can be expressed as "Co2+(Co2+/Sn4+)O4. It exhibits a ferrimagnetic transition with a compensate transition around 11K due to two Co2+ (tetrahedral and octahedral) sublattices. The B site is partially occupied by non-magnetic Sn4+ and the magnetism is associated with network of Co2+ ions distributed over the A site and half of the B sites. We have grown the Co2SnO4 single crystal of size 1mm3 for the first-time using flux technique and it is ideal system to measure the Co2+ magnetism with non-magnetic Sn on the B site. Our single crystal sample is characterised using single crystal x-ray and magnetometry. Recently, we have measured the diffused scattering at room temperature on the SXD beam line using Xpress time. The experiment was successful and now we would like to study the Co2+ magnetism at low temperature.
DOI: 10.3535/8gx-wqp-jzl
title: Poa L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/p7n-zr0-0z1
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e/isis.e.rb2310437
title: Magnetically frustrated dynamics on the Cairo pentagonal lattice

description: We have synthesized a large high quality 2.35 g single crystal of Bi2Fe4O9, a quasi two-dimensional Cairo pentagonal lattice, a new motif in geometrical frustration. Bi2Fe4O9 shows AF order for T &lt; 245 K while θCW = -1670 K, indicating strong frustration. Above Tn an unusual emergent state exists. In order to understand the emergent state is imperative that ground state is well characterised. Previous studies on a smaller single crystal and powder samples by other groups found spin waves in the energy range 5-100 meV with one model indicating a strong need for anisotropy while the other does not. Two of the spins couple strongly (24 meV) and the others less strong (3-6 meV), with all couplings found to be AFM. We have independently investigated the low-energy spin wave excitations at 10 K with high energy resolution using CAMEA and EIGER at PSI, and have uncovered significant differences to previous work. In particular we observe a clear double spin gap. We now wish to extend our inelastic neutron scattering studies to access higher energy spin waves across S(Q, ω) in the ordered phase and the disordered phases. This will improve the understanding of the Hamiltonian of this system in order and address the effect of geometrical frustration in this unique pentagonal system. MERLIN is ideally suited to probe the subtle effects found in this compound.
DOI: 10.5286/isis.e/isis.e.rb2410061
title: Uniaxial strain tuning of structural instabilities associated with 1/8th anomaly in high-Tc cuprates

description: Competition exists in the high-Tc cuprates between the superconducting (SC), pseudogap and ordered charge density wave (CDW) states. A key doping level for understanding these competitions has been the 1/8 doping level, where an anomaly in the SC dome occurs (e.g., La2-xBaxCuO4), that is concomitant with a first order structural phase transition and is understood to supress 3D SC. However, very recently we have shown that this structural phase transition does not run to completion, suggesting a natural explanation for the persistence of only 2D (in plane) SC at the 1/8 anomaly. Building on our recent theoretical predictions, we propose a single crystal in situ strain field experiment on WISH to tune the competition between these phases. Our results will provide a greater understanding of how the 3D SC state can be stabilised to higher temperatures in the high-Tc cuprates.
DOI: 10.5286/isis.e/isis.e.rb2410061-1
title: Uniaxial strain tuning of structural instabilities associated with 1/8th anomaly in high-Tc cuprates

description: Competition exists in the high-Tc cuprates between the superconducting (SC), pseudogap and ordered charge density wave (CDW) states. A key doping level for understanding these competitions has been the 1/8 doping level, where an anomaly in the SC dome occurs (e.g., La2-xBaxCuO4), that is concomitant with a first order structural phase transition and is understood to supress 3D SC. However, very recently we have shown that this structural phase transition does not run to completion, suggesting a natural explanation for the persistence of only 2D (in plane) SC at the 1/8 anomaly. Building on our recent theoretical predictions, we propose a single crystal in situ strain field experiment on WISH to tune the competition between these phases. Our results will provide a greater understanding of how the 3D SC state can be stabilised to higher temperatures in the high-Tc cuprates.
DOI: 10.34816/ifao.archives.232817
title: SAQQARA_nb_1994_03288

description: Référence : nb_1994_03288<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/3w1-qxk-9ca
title: Crataegus azarolus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/99y-lzt-47e
title: Asteraceae Dumort.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e/isis.e.rb2410220-1
title: Operando muSR measurement on Na diffusion in NaCrO2 half cell

description: In order to see Na diffusion in Na-ion battery materials, we here propose an operando muSR experiment on NaCrO2-vs-Na half-cell. Here, NaCrO2 is one of the best candidates for the cathode material in a Na-ion battery, particularly due to the absence of expensive Co. However, the intrinsic diffusion coefficient of Na ions in NaxCrO2, which governs a charge/discharge performance of the battery, is still not clarified. Our proposed experiment will provide basic information how to understand Na diffusion in materials and lead to the control of Na diffusion in battery materials.
DOI: 10.5286/isis.e/isis.e.rb2420338
title: Search for a spin supersolid in the novel triangular lattice antiferromagnet ErTa7O19

description: Ising triangular lattice antiferromagnets represent a promising avenue in the search for enigmatic quantum states of matter. Our previous studies have demonstrated that erbium heptatantalate, ErTa7O19, is a realization of such a system with intriguing magnetic properties. Recent single-crystal neutron diffraction measurements performed on the WISH instrument (RB2320281) have revealed long range magnetic order below TN = 105 mK that seems to coexist with diffuse magnetic scattering, characteristic of exotic disordered quantum states. Here we propose additional high-statistics measurements on the WISH instrument in the (HK0) scattering plane to determine the nature of this diffuse signal, as well as additional measurement in the (HHL) scattering plane to determine the size of both the out-of-plane and the in-plane components of the ordered magnetic moment. This should allow us to confirm whether the highly-sought-after spin supersolid state is present in ErTa7O19.
DOI: 10.5286/isis.e/isis.e.rb2420338-1
title: Search for a spin supersolid in the novel triangular lattice antiferromagnet ErTa7O19

description: Ising triangular lattice antiferromagnets represent a promising avenue in the search for enigmatic quantum states of matter. Our previous studies have demonstrated that erbium heptatantalate, ErTa7O19, is a realization of such a system with intriguing magnetic properties. Recent single-crystal neutron diffraction measurements performed on the WISH instrument (RB2320281) have revealed long range magnetic order below TN = 105 mK that seems to coexist with diffuse magnetic scattering, characteristic of exotic disordered quantum states. Here we propose additional high-statistics measurements on the WISH instrument in the (HK0) scattering plane to determine the nature of this diffuse signal, as well as additional measurement in the (HHL) scattering plane to determine the size of both the out-of-plane and the in-plane components of the ordered magnetic moment. This should allow us to confirm whether the highly-sought-after spin supersolid state is present in ErTa7O19.
DOI: 10.3535/3rd-jbc-pxe
title: Carex aquatilis Wahlenb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/tzd-vk1-avx
title: Crataegus azarolus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e/isis.e.rb2400047
title: Neutron tomography of carious teeth before and after treatment with hydrosilicate cement

description: Dental caries results in the breakdown of tooth structure. It is caused by bacteria
adherent to the tooth that ferment carbohydrates in the diet. Clinical management of
dental caries involves the removal of the demineralized tooth structure followed by
dressing and restoration of the tooth.
The materials that are placed over the freshly prepared dentine are bioactive. These
materials have a calcium silicate chemistry and interact with the dentine to form
hydroxyapatite. The extent of the remineralisation is unknown. Furthermore there is
considerable technical difficulty in assessing the tooth to material interface as the
techniques used distort the dental hard tissues.
The aim of this proposal is to use neutron tomography to characterise the carious teeth before and after treatment with hydraulic cement.
DOI: 10.5286/isis.e/isis.e.rb2400047-1
title: Neutron tomography of carious teeth before and after treatment with hydrosilicate cement

description: Dental caries results in the breakdown of tooth structure. It is caused by bacteria
adherent to the tooth that ferment carbohydrates in the diet. Clinical management of
dental caries involves the removal of the demineralized tooth structure followed by
dressing and restoration of the tooth.
The materials that are placed over the freshly prepared dentine are bioactive. These
materials have a calcium silicate chemistry and interact with the dentine to form
hydroxyapatite. The extent of the remineralisation is unknown. Furthermore there is
considerable technical difficulty in assessing the tooth to material interface as the
techniques used distort the dental hard tissues.
The aim of this proposal is to use neutron tomography to characterise the carious teeth before and after treatment with hydraulic cement.
DOI: 10.5286/isis.e/isis.e.rb2410220
title: Operando muSR measurement on Na diffusion in NaCrO2 half cell

description: In order to see Na diffusion in Na-ion battery materials, we here propose an operando muSR experiment on NaCrO2-vs-Na half-cell. Here, NaCrO2 is one of the best candidates for the cathode material in a Na-ion battery, particularly due to the absence of expensive Co. However, the intrinsic diffusion coefficient of Na ions in NaxCrO2, which governs a charge/discharge performance of the battery, is still not clarified. Our proposed experiment will provide basic information how to understand Na diffusion in materials and lead to the control of Na diffusion in battery materials.
DOI: 10.34816/ifao.archives.232818
title: SAQQARA_nb_1994_03289

description: Référence : nb_1994_03289<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/qs0-s1v-r2h
title: Herniaria hirsuta L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.