cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.3535/zgf-gl2-y8j
title: Euphorbia maculata L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420453-1
title: Evolution of magnetic structure in Fe4O5

description: High pressure can stabilize crystal structures unthinkable at ambient conditions with novel and unusual physical
properties. The high-pressure research on the Fe-O system during the last decade revealed a whole new family of iron
oxides with unusual stoichiometry like Fe4O5, Fe5O6, Fe7O9, etc. They belong to the same homologous series and are
comprised of two principal building blocks, the two-dimensional slabs of iron octahedra separated by one-dimensional
chains of iron ions coordinated by trigonal prisms. In our recent work, we developed a unified crystallographic approach
to this series of iron oxides. Based on this approach we were able to demonstrate that magnetic interactions in the one-
dimensional chains have symmetry protection against perturbations from surroundings and that these oxides can adopt
either ferromagnetic or antiferromagnetic ground state depending on the width of the octahedral slabs in the structure.
In this proposal, we intend to experimentally test these crystallographic conjectures using powder neutron diffraction on
the WISH instrument to determine the evolution of magnetic structure in Fe4O5.
DOI: 10.5286/isis.e.rb2420511
title: INS study of novel thermoelectric metal-organic frameworks

description: Thermoelectrics (TEs) are an important class of materials that can directly convert thermal waste heat into useful electrical energy and have great potential to contribute to the sustainability agenda. Despite such possibilities, barriers exist to their widespread adoption due to the low efficiency of current materials. Metal-organic frameworks (MOFs) are an class of porous materials which are comprised of a self-assembled lattice structure of positive metal ions or clusters coordinated to anionic ‘linkers’. They also make ideal candidates for new TE materials given their ultra-low thermal conductivity and tunable electrical conductivity. A number of TE MOFs with a general formula M3(Linker)2 where M = Cu(II) or Ni(II), and Linker = hydroxytriphenylene or hexaaminotriphenylene have demonstrated promising TE capabilities, in particular upon absorption of guests in their porous network. Understanding the vibrational properties of the materials (interaction and dynamics) as a function of their composition and molecular doping is essential for their improved design. Thus, we request 2 days of beamtime on TOSCA to complete the INS study of above-mentioned doped and un-doped compounds.
DOI: 10.5286/isis.e.rb2420511-1
title: INS study of novel thermoelectric metal-organic frameworks

description: Thermoelectrics (TEs) are an important class of materials that can directly convert thermal waste heat into useful electrical energy and have great potential to contribute to the sustainability agenda. Despite such possibilities, barriers exist to their widespread adoption due to the low efficiency of current materials. Metal-organic frameworks (MOFs) are an class of porous materials which are comprised of a self-assembled lattice structure of positive metal ions or clusters coordinated to anionic ‘linkers’. They also make ideal candidates for new TE materials given their ultra-low thermal conductivity and tunable electrical conductivity. A number of TE MOFs with a general formula M3(Linker)2 where M = Cu(II) or Ni(II), and Linker = hydroxytriphenylene or hexaaminotriphenylene have demonstrated promising TE capabilities, in particular upon absorption of guests in their porous network. Understanding the vibrational properties of the materials (interaction and dynamics) as a function of their composition and molecular doping is essential for their improved design. Thus, we request 2 days of beamtime on TOSCA to complete the INS study of above-mentioned doped and un-doped compounds.
DOI: 10.3535/32z-khx-a63
title: Astelia pumila (J.R.Forst.) Gaudich.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/qh0-xke-a4d
title: Lepidothamnus fonkii Phil.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410287-2
title: Deformation Behaviour of Novel BCC-Superalloys for High Temperature Application

description: A range of body-centered cubic (BCC) superalloys for high-temperature applications are being developed by the Materials for Extreme Environments group at the University of Birmingham. In this proposal, we intend to perform in-situ loading experiments on Cr-, Fe- and W-based BCC superalloys strengthened by coherent B2 intermetallic nanoprecipitates. This study aims to investigate the phase evolution and optimal value of lattice misfit for increasing the load transfer from matrix to precipitates and combat softening at high temperatures. The in-situ compressive loading experiments will be conducted from room temperature to 900 C at Engin-X. The results of this study will provide insights into the micromechanical behaviour of these novel alloys.
DOI: 10.5286/isis.e.rb2420453
title: Evolution of magnetic structure in Fe4O5

description: High pressure can stabilize crystal structures unthinkable at ambient conditions with novel and unusual physical
properties. The high-pressure research on the Fe-O system during the last decade revealed a whole new family of iron
oxides with unusual stoichiometry like Fe4O5, Fe5O6, Fe7O9, etc. They belong to the same homologous series and are
comprised of two principal building blocks, the two-dimensional slabs of iron octahedra separated by one-dimensional
chains of iron ions coordinated by trigonal prisms. In our recent work, we developed a unified crystallographic approach
to this series of iron oxides. Based on this approach we were able to demonstrate that magnetic interactions in the one-
dimensional chains have symmetry protection against perturbations from surroundings and that these oxides can adopt
either ferromagnetic or antiferromagnetic ground state depending on the width of the octahedral slabs in the structure.
In this proposal, we intend to experimentally test these crystallographic conjectures using powder neutron diffraction on
the WISH instrument to determine the evolution of magnetic structure in Fe4O5.
DOI: 10.34816/ifao.archives.232861
title: SAQQARA_nb_1994_03338

description: Référence : nb_1994_03338<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/n1g-rxd-hfw
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310034
title: Muon-Spin relaxation study of the spin-spin correlations in spin gapped layered compound Na2Cu2TeO6

description: Na2Cu2TeO6 has been recognised as a spin-gapped layered compound and a Mott insulator. It has been proposed that non-orthogonal spin dimers lie on Cu2TeO6 layers, which piles up with alternative Na layers. The magnetic susceptibility shows a broad maximum at about Tmax = 160 K associated with a spin gap of ~ 250 K. The considerably large spin gap of about 250 K indicates the existence of a strong super-exchange coupling, which was also addressed by the 125Te NMR studies. The Muon-spin rotation/relaxation (muSR) study is one of the powerful microscopic tools, which can probe both the static and dynamic characteristics of spins. Till now, the muSR studies have not been attempted to address the low dimensional short range ordering. We therefore propose to investigate the temperature dependence of muSR on Na2Cu2TeO6 both in zero magnetic field and in presence of magnetic field.
DOI: 10.5286/isis.e.rb2310034-1
title: Muon-Spin relaxation study of the spin-spin correlations in spin gapped layered compound Na2Cu2TeO6

description: Na2Cu2TeO6 has been recognised as a spin-gapped layered compound and a Mott insulator. It has been proposed that non-orthogonal spin dimers lie on Cu2TeO6 layers, which piles up with alternative Na layers. The magnetic susceptibility shows a broad maximum at about Tmax = 160 K associated with a spin gap of ~ 250 K. The considerably large spin gap of about 250 K indicates the existence of a strong super-exchange coupling, which was also addressed by the 125Te NMR studies. The Muon-spin rotation/relaxation (muSR) study is one of the powerful microscopic tools, which can probe both the static and dynamic characteristics of spins. Till now, the muSR studies have not been attempted to address the low dimensional short range ordering. We therefore propose to investigate the temperature dependence of muSR on Na2Cu2TeO6 both in zero magnetic field and in presence of magnetic field.
DOI: 10.5286/isis.e.rb2410297-1
title: Substitution Effect on the Magnetic Interaction of Zn1-x(Co, Al)xO Nanoparticles Studied by μSR

description: The development of communication and information devices has grown rapidly in recent years. This growth is supported by the reduction of the size of the transistor which can increase the storage capacity, speed, and efficiency of the devices. However, the reduction of the size of the transistor will meet the limit when it continues to be lowered to the atomic size. Heat dissipation and quantum-size effects will cause significant changes in the writing and reading processes which cannot be avoided. One of the solutions to this problem is developing spintronic technologies based on magnetic semiconductors. We have studied the magnetization of semiconductor Zn1-x(Co, Al)xO nanoparticles by using a superconducting quantum interference device magnetometer (SQUID). We found that it shows magnetism even at high temperatures when Al is doped on the ZnO. When Co is doped to the ZnO, it behaves magnetically at 2 K, meanwhile, behaves paramagnetic at 100 K and 300 K. The relationship between magnetic interactions and doping effects is still left to be clarified. Therefore, μSR is needed here to gain a better understanding of the magnetic interactions and confirm the magnetic phase of Zn1-x(Co, Al)xO. In this proposed study, we aim to study the magnetic state of Zn1-x(Co, Al)xO at the base temperature up to room temperature and its magnetic spin fluctuation.
DOI: 10.3535/bc0-8xb-n4v
title: Festuca myuros L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/x38-5m3-0w5
title: Poaceae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410297
title: Substitution Effect on the Magnetic Interaction of Zn1-x(Co, Al)xO Nanoparticles Studied by μSR

description: The development of communication and information devices has grown rapidly in recent years. This growth is supported by the reduction of the size of the transistor which can increase the storage capacity, speed, and efficiency of the devices. However, the reduction of the size of the transistor will meet the limit when it continues to be lowered to the atomic size. Heat dissipation and quantum-size effects will cause significant changes in the writing and reading processes which cannot be avoided. One of the solutions to this problem is developing spintronic technologies based on magnetic semiconductors. We have studied the magnetization of semiconductor Zn1-x(Co, Al)xO nanoparticles by using a superconducting quantum interference device magnetometer (SQUID). We found that it shows magnetism even at high temperatures when Al is doped on the ZnO. When Co is doped to the ZnO, it behaves magnetically at 2 K, meanwhile, behaves paramagnetic at 100 K and 300 K. The relationship between magnetic interactions and doping effects is still left to be clarified. Therefore, μSR is needed here to gain a better understanding of the magnetic interactions and confirm the magnetic phase of Zn1-x(Co, Al)xO. In this proposed study, we aim to study the magnetic state of Zn1-x(Co, Al)xO at the base temperature up to room temperature and its magnetic spin fluctuation.
DOI: 10.5286/isis.e.rb2410354
title: The magnetic crossover diagram of RbCuF3

description: KCuF3 is a famous quasi-one-dimensional S = ½ Heisenberg antiferromagnet, which displays many novel quantum magnetic properties including high-temperature dynamics, quantum critical scaling and signals of entanglement. In contrast, the other ACuF3 (A = Ag, Rb,NH4/ND4) have not been as deeply investigated due to the difficulties of procuring high quality single crystals. We have grown the first single crystal of RbCuF3 that is of a high enough quality for neutron spectroscopy. We propose to use MERLIN to investigate whether the dimensional crossover found in KCuF3 exists in RbCuF3 via the magnetic excitation spectrum. If the longitudinal mode is present in RbCuF3, we can identify not only whether RbCuF3 behaves like a 1D Luttinger liquid, but also the energy and temperature ranges over which the quantum critical point dominates.
DOI: 10.5286/isis.e.rb2410354-2
title: The magnetic crossover diagram of RbCuF3

description: KCuF3 is a famous quasi-one-dimensional S = ½ Heisenberg antiferromagnet, which displays many novel quantum magnetic properties including high-temperature dynamics, quantum critical scaling and signals of entanglement. In contrast, the other ACuF3 (A = Ag, Rb,NH4/ND4) have not been as deeply investigated due to the difficulties of procuring high quality single crystals. We have grown the first single crystal of RbCuF3 that is of a high enough quality for neutron spectroscopy. We propose to use MERLIN to investigate whether the dimensional crossover found in KCuF3 exists in RbCuF3 via the magnetic excitation spectrum. If the longitudinal mode is present in RbCuF3, we can identify not only whether RbCuF3 behaves like a 1D Luttinger liquid, but also the energy and temperature ranges over which the quantum critical point dominates.
DOI: 10.34816/ifao.archives.232862
title: SAQQARA_nb_1994_03339

description: Référence : nb_1994_03339<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/4wl-y9w-6wr
title: Koeleria Pers.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/b38-7e9-1w9
title: Festuca Tourn. ex L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220134
title: Spin-liquid state in a geometrically frustrated antiferromagnet CrMgGaO4
DOI: 10.5286/isis.e.rb2220134-2
title: Spin-liquid state in a geometrically frustrated antiferromagnet CrMgGaO4

description: Quenched randomness offered a novel paradigm in stabilizing quantum disordered spin-liquid-like states in geometrically frustrated magnets. This notion is exemplified in a range of quantum magnets. This naturally gives rise to a hierarchy of magnetism: quantum paramagnet at high T and random quantum disordered magnet at low T. As bond randomness generates abundant low-energy excitations that mimic a gapless quantum spin liquid, spin excitations and dynamics will be distinct from what is expected for the true quantum spin liquid. Here, we introduce a new frustrated antiferromagnet CrMgGaO4, wherein Cr3+ (S = 3/2) ions are connected to each other via a corner-shared tetrahedral network in 3D. The proposed study will deepen our understanding of the role of chemical disorders in modifying low-energy spin excitations on a microscopic scale in frustrated 3D antiferromagnets.
DOI: 10.5286/isis.e.rb2420440-1
title: Understanding Disruption to the Bulk Water Structure by Ion Structure with Respect to Planetary Aqueous Environments

description: Placeholder
DOI: 10.3535/8h1-lgz-rz0
title: Festuca incurva (Gouan) Gutermann

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/lwc-ajz-9rb
title: Festuca Tourn. ex L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420345
title: Interplay of hydration, magnetic order, and proton-conduction pathway in Co[Cr(CN)6]2/3.xH2O

description: We wish to use neutron diffraction to characterise experimentally the nature of magnetic order in Co[Cr(CN)6]2/3·xH2O as a function of water content. At the same time, and by combining our neutron measurements with complementary X-ray powder diffraction measurements, we will seek to determine the structural ramifications of magnetic order in terms of both magnetoelastic coupling and also the distribution and occupation of H2O molecular sites.
DOI: 10.5286/isis.e.rb2420345-1
title: Interplay of hydration, magnetic order, and proton-conduction pathway in Co[Cr(CN)6]2/3.xH2O

description: We wish to use neutron diffraction to characterise experimentally the nature of magnetic order in Co[Cr(CN)6]2/3·xH2O as a function of water content. At the same time, and by combining our neutron measurements with complementary X-ray powder diffraction measurements, we will seek to determine the structural ramifications of magnetic order in terms of both magnetoelastic coupling and also the distribution and occupation of H2O molecular sites.
DOI: 10.5286/isis.e.rb2420440
title: Understanding Disruption to the Bulk Water Structure by Ion Structure with Respect to Planetary Aqueous Environments

description: Placeholder
DOI: 10.34816/ifao.archives.232863
title: SAQQARA_nb_1994_03340

description: Référence : nb_1994_03340<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/cjn-eyw-2gx
title: Euphorbia phymatosperma Boiss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220350
title: Correlating dynamical molecular behaviour with controlled anti-cancer drug release from zeolite H-ZSM5

description: Zeolites are crystalline porous materials ideal for use as drug delivery systems as they are sustainable, recyclable, and can house drug molecules of interest. We aim to perform the first QENS experiments probing the mobility of 5FU in H-ZSM-5 zeolites while varying the Si/Al ratio and therefore the Br�nsted acid density to determine its effect on drug mobility. We will study the mobility of 5FU in zeolites H-ZSM-5 (Si/Al = 15, 40 and 140) at body temperature (310 K). This will allow for both validation of classical molecular dynamics studies probing 5FU mobility in zeolites carried out so far, and for a detailed understanding of how framework characteristics such as Si/Al ratio affect molecular behaviour of 5FU, crucial for the design and optimisation of affordable and precisely controlled release dosage forms of anticancer drugs.
DOI: 10.5286/isis.e.rb2220350-1
title: Correlating dynamical molecular behaviour with controlled anti-cancer drug release from zeolite H-ZSM5

description: Zeolites are crystalline porous materials ideal for use as drug delivery systems as they are sustainable, recyclable, and can house drug molecules of interest. We aim to perform the first QENS experiments probing the mobility of 5FU in H-ZSM-5 zeolites while varying the Si/Al ratio and therefore the Br�nsted acid density to determine its effect on drug mobility. We will study the mobility of 5FU in zeolites H-ZSM-5 (Si/Al = 15, 40 and 140) at body temperature (310 K). This will allow for both validation of classical molecular dynamics studies probing 5FU mobility in zeolites carried out so far, and for a detailed understanding of how framework characteristics such as Si/Al ratio affect molecular behaviour of 5FU, crucial for the design and optimisation of affordable and precisely controlled release dosage forms of anticancer drugs.
DOI: 10.5286/isis.e.rb2420359-1
title: The pressure response of Prussian white

description: Prussian white, Na2Fe[Fe(CN)6]·nH2O, is an interesting material both fundamentally and from an applied perspective. The cyanide-based double perovskite structure has a complex phase behaviour dictated by both temperature and the hydration state. A range of phase transitions arise from changes to the octahedral tilting, like for perovskites. Despite the technological interest in this material, its high-pressure behaviour has still not been investigated. By studying hydrated and dehydrated Prussian white with neutron diffraction under high pressure, we will elucidate the phase transitions, determine the bulk modulus and explore the possibility of pressure-induced spin crossover. Unlike temperature, compression is decoupled from changes in the hydration state, which will allow detailed studies of the hydrated state. In summary, there are many reasons why investigating the high-pressure behaviour of Prussian white is worthwile. Our study will give fundamental insights into the structural behaviour and will be useful for future applications with the material.
DOI: 10.3535/sez-y5z-z0k
title: Lamarckia aurea (L.) Moench

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/z4z-32n-han
title: Viola cucullata Aiton

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420121
title: Investigation of the morphology of biodegradable soft colloids

description: The aim of this project is to study the morphology of biodegradable soft colloids (microgels) made of hydroxypropyl cellulose (HPC). Stimuli-responsive microgels are of great interest for a variety of applications (functional coatings, viscosity modifiers, healthcare). For most processing needs (from injection to coatings), knowledge of the particle morphology is of utmost importance to tailor and predict the properties of dense suspensions and the interaction with interfaces. Un to now, the vast majority of fundamental and applied research focused on synthetic microgels. However, the growing interest in sustainability and biocompatibility calls for the development of novel “green” alternatives. We here focus on HPC, which allows synthesizing temperature-responsive particles that are biocompatible and biodegradable. To investigate their morphology, we plan to obtain form factors as a function of the synthesis protocols employed (reaction temperature and molecular weight), and compare them with monomer-resolved simulations from collaborators. We then plan to quantify the particle softness by using a recently introduced methodology to exert a controlled osmotic stress onto the microgels with partially deuterated linear polymers, using SANS with contrast variation to extrapolate the resulting microgels size. Overall, these results will be of fundamental importance in designing novel soft colloids that grant sustainable alternatives for the development of responsive materials.