cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2320315-1
title: Investigation of Nitrogen Ionic Motion and The Magneto-ionic Effect

description: Magneto-ionics have emerged as an effective approach to control magnetic properties through ionic motion, which is controllable by electric fields. This approach has the potential to electrically manipulate exchange bias (EB), which has fundamental applications in many spin-valve type spintronic devices. The sample structure proposed for PNR studies on the POLREF instrument is Ta/Mn4N/Mn3N2, which contains an antiferromagnetic (AF) Mn3N2 layer and ferrimagnetic (FiM) Mn4N layer. Through coupling between Mn4N and Mn3N2, a significant EB (1367 Oe) is observed when the structure is field cooled to 5K, and by driving N ions with an electric field, the EB can be enhanced by 13%(~184 Oe). X-ray diffraction and electron microscopy have identified Mn3N2, Mn2N, and Mn4N phases in the structure, but they, along with X-ray reflectivity, have failed to identify N content changes after electric field application. Unlike X-ray scattering length densities (SLDs), neutron SLDs have a wide variation between these different MnNx phases, which is contributed to by the large positive SLD of N and the negative SLD of Mn. Previous PNR investigations by our group have demonstrated that this allows small N variations in MnN to be resolved, below what is detectable by other techniques. Our goal is to resolve similar changes in the proposed structure, with the additional aim of using polarized neutrons to determine the depth-dependent distribution of the various MnNx phases in the structure.
DOI: 10.3535/0fg-71n-csd
title: Astelia menziesiana Sm.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/7yr-fmj-pr5
title: Ranunculus nodiflorus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310647
title: Magnetic excitations in maghemite nanoparticles - a pre-study

description: Hysteretic heating of ferro and ferrimagnetic nanoparticles holds promise in both cancer treatment (magnetic hyperthermia) and for providing efficient heating in industrial-scale reactors. A direct in-situ measurement of the temperature of the nanoparticles as they are exposed to high-frequency AC magnetic fields is however lacking. Here we propose a pre-study of the magnetic and lattice excitations in nanoparticulate maghemite in zero field and as a function of temperature. The aim is to identify characteristic features in the excitation spectrum. Under AC-field conditions, i.e. in a future experiment, these should in theory allow us to directly determine the nanoparticle temperature via the detailed balance factor in the cross-section.
DOI: 10.5286/isis.e.rb2310647-1
title: Magnetic excitations in maghemite nanoparticles - a pre-study

description: Hysteretic heating of ferro and ferrimagnetic nanoparticles holds promise in both cancer treatment (magnetic hyperthermia) and for providing efficient heating in industrial-scale reactors. A direct in-situ measurement of the temperature of the nanoparticles as they are exposed to high-frequency AC magnetic fields is however lacking. Here we propose a pre-study of the magnetic and lattice excitations in nanoparticulate maghemite in zero field and as a function of temperature. The aim is to identify characteristic features in the excitation spectrum. Under AC-field conditions, i.e. in a future experiment, these should in theory allow us to directly determine the nanoparticle temperature via the detailed balance factor in the cross-section.
DOI: 10.5286/isis.e.rb2320035
title: Effect of Trace Ions on Self-assembly in Ionic Liquids

description: In our earlier work with cationic surfactants (dodecyltrimethylammonium, DTA+) in ethylammonium nitrate (EAN, an ionic liquid), we found that the critical micelle concentration (CMC) and micelle morphology is sensitive to the choice of surfactant counterion. This is surprising as the nitrate concentration in EAN is ~100 x higher than counterions of added surfactant. Based on stoichiometry, ~99 % of DTA+ surfactant in solution should predominately interact with nitrate regardless of their original counterion. This observed dependency on surfactant counterion highlights that ion specific effects are present, and can be used as an effective tool to regulate self-assembly processes in high ionic strength solutions. The origin of specific ion effect in high ionic strength solutions is not well understood and potentially relates to the anomalous long screening length observed in these solutions. This experiment will examine dodecyltrimethylammonium bromide and nitrate self-assembly in EAN, ethylammonium thiocyanate (EASCN), and ethanolammonium nitrate (EtAN) to reveal the origin of ion specific effects in ILs, as well as their dependency on IL composition and structures.
DOI: 10.3535/11t-awd-sjq
title: Orchidaceae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/8rk-qnh-bxg
title: Astelia papuana Skottsb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2300082
title: Muon spin relaxation study on the Shastry−Sutherland lattice antiferromagnet Pr2Ga2BeO7

description: In the study of frustrated magnetism, the Shastry−Sutherland lattice (SSL), an arrangement of orthogonal dimers with antiferromagnetic interdimer coupling J2 and the intradimer coupling J1, represents one of the few exactly solvable structures. The SSL ground state is known when the ratio J2/J1 is small or large, but the states of the intermediate values are still unclear. Rare-earth-based SSL frustrated magnets can give rise to diverse exotic magnetic ground states such as quantum spin liquid. We have recently synthesized single crystals of a new family of rare-earth based SSL compound Pr2Ga2BeO7 and characterized it using magnetization, heat capacity and thermal conductivity experiments, which indicate that Pr2Ga2BeO7 is an ideal candidate of quantum spin liquids. In order to analyze the magnetic fluctuations from the spin dynamiscs to accomplish the manuscript and give direction for the inelastic neutron scattering at JAEA on Feb. 2024, we intend to measure the muon spin rotation and relaxation.
DOI: 10.5286/isis.e.rb2300082-1
title: Muon spin relaxation study on the Shastry−Sutherland lattice antiferromagnet Pr2Ga2BeO7

description: In the study of frustrated magnetism, the Shastry−Sutherland lattice (SSL), an arrangement of orthogonal dimers with antiferromagnetic interdimer coupling J2 and the intradimer coupling J1, represents one of the few exactly solvable structures. The SSL ground state is known when the ratio J2/J1 is small or large, but the states of the intermediate values are still unclear. Rare-earth-based SSL frustrated magnets can give rise to diverse exotic magnetic ground states such as quantum spin liquid. We have recently synthesized single crystals of a new family of rare-earth based SSL compound Pr2Ga2BeO7 and characterized it using magnetization, heat capacity and thermal conductivity experiments, which indicate that Pr2Ga2BeO7 is an ideal candidate of quantum spin liquids. In order to analyze the magnetic fluctuations from the spin dynamiscs to accomplish the manuscript and give direction for the inelastic neutron scattering at JAEA on Feb. 2024, we intend to measure the muon spin rotation and relaxation.
DOI: 10.5286/isis.e.rb2320234-2
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: 10.15468/dl.kjkqvz
title: Occurrence Download

description: A dataset containing 11 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Codonopsis cardiophylla Diels ex Kom."
 ]
}

 The dataset includes 11 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0109248-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/1vm-jze-1ny
title: Astelia neocaledonica Schltr.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/7es-2se-9s9
title: Astelia papuana Skottsb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220557-1
title: In Situ Hydrothermal Crystallisation Study of Strontium Ruthenates
DOI: 10.5286/isis.e.rb2300089
title: DM Xpress - Resolving the Structure of Bulk Li2.19PO2.8N0.53 Glass

description: Lithium phosphorous oxynitrate (LiPON) are amorphous materials promising for being targeted for next generation solid-state batteries due to their chemical and mechanical stability against lithium metal. While these materials are synthetised as thin-films, bulk electrolytes have enhanced structural stability and mechanical strength, coupled with simple manufacturing and reduced interfacial damage. Here, we have synthetized for the first time LiPON in bulk, with the same composition of LiPON thin-films. Preliminary PDF analysis from silver-source X-ray measurements show that the oxygen atoms are in part coordinated with the phosphorous, while the nitrogen atoms are found at longer distances, with lower coordination than expected, as they might be involved in N-Li motifs. Our X-ray study cannot determine unambiguously the role of lithium in the glass arrangement, and therefore we are requesting one measurement on SANDALS (~2h). The aim of this measurement is twofold: firstly bulk LiPON is the best candidate for a quantitative structural characterization of these glasses including the occurrence (and not just the existence) of the bonding motifs; secondly the experimental results will be compared with the ones obtained from machine learning. When agreement is reached, we can then confidently use ML as a tool to predict the material structure and composition that maximise the electrochemical performances of these solid electrolytes.
DOI: 10.5286/isis.e.rb2300089-1
title: DM Xpress - Resolving the Structure of Bulk Li2.19PO2.8N0.53 Glass

description: Lithium phosphorous oxynitrate (LiPON) are amorphous materials promising for being targeted for next generation solid-state batteries due to their chemical and mechanical stability against lithium metal. While these materials are synthetised as thin-films, bulk electrolytes have enhanced structural stability and mechanical strength, coupled with simple manufacturing and reduced interfacial damage. Here, we have synthetized for the first time LiPON in bulk, with the same composition of LiPON thin-films. Preliminary PDF analysis from silver-source X-ray measurements show that the oxygen atoms are in part coordinated with the phosphorous, while the nitrogen atoms are found at longer distances, with lower coordination than expected, as they might be involved in N-Li motifs. Our X-ray study cannot determine unambiguously the role of lithium in the glass arrangement, and therefore we are requesting one measurement on SANDALS (~2h). The aim of this measurement is twofold: firstly bulk LiPON is the best candidate for a quantitative structural characterization of these glasses including the occurrence (and not just the existence) of the bonding motifs; secondly the experimental results will be compared with the ones obtained from machine learning. When agreement is reached, we can then confidently use ML as a tool to predict the material structure and composition that maximise the electrochemical performances of these solid electrolytes.
DOI: 10.3535/hxe-sj5-bsa
title: Neotinea ustulata (L.) R.M.Bateman, Pridgeon & M.W.Chase

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220557
title: In Situ Hydrothermal Crystallisation Study of Strontium Ruthenates
DOI: 10.5286/isis.e.rb2255019
title: Diamond Proprietary Use of WISH
DOI: 10.5286/isis.e.rb2255019-1
title: Diamond Proprietary Use of WISH
DOI: 10.3535/apd-1le-srm
title: Astelia neocaledonica Schltr.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ldx-tkb-wr4
title: Ranunculus muricatus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220683-5
title: Spin Wave Dispersion in Perovskite Nickelates
DOI: 10.5286/isis.e.rb2310204
title: Estimation of field dependent Luttinger parameter in a single crystal of a Tomonaga-Luttinger liquid C14H18CuN4O10 via muon spin rotation

description: The ground state of a spin ½ Heisenberg antiferromagnetic chain is a Tomonaga-Luttinger liquid (TLL) where quantum mechanical fluctuations do not allow for long range order even at T = 0 K. The TLL is quantum critical with respect to an applied magnetic field upto a saturation field Hs above which it transforms to a fully polarized state. The excitation spectra of the TLL is gapless comprising spin ½ interacting fermions known as spinons. The statics and dynamics of the spinons can be understood in terms of two parameters, namely, the Luttinger parameter K, which quantifies the interaction strength between spinons, and the Fermi velocity u, which links energy and momentum of the low-energy dynamics. C14H18CuN4O10 has been shown to be an excellent realization of a TLL with an exchange coupling constant J/kB = 1.23 K and a moderate value of Hs = 1.72 T. By doing a field dependent muon spin rotation measurement on C14H18CuN4O10, we wish to estimate the field variation of K, and consequently, the kind of interaction (repulsive/attractive) that may be at play.
DOI: 10.5286/isis.e.rb2310204-1
title: Estimation of field dependent Luttinger parameter in a single crystal of a Tomonaga-Luttinger liquid C14H18CuN4O10 via muon spin rotation

description: The ground state of a spin ½ Heisenberg antiferromagnetic chain is a Tomonaga-Luttinger liquid (TLL) where quantum mechanical fluctuations do not allow for long range order even at T = 0 K. The TLL is quantum critical with respect to an applied magnetic field upto a saturation field Hs above which it transforms to a fully polarized state. The excitation spectra of the TLL is gapless comprising spin ½ interacting fermions known as spinons. The statics and dynamics of the spinons can be understood in terms of two parameters, namely, the Luttinger parameter K, which quantifies the interaction strength between spinons, and the Fermi velocity u, which links energy and momentum of the low-energy dynamics. C14H18CuN4O10 has been shown to be an excellent realization of a TLL with an exchange coupling constant J/kB = 1.23 K and a moderate value of Hs = 1.72 T. By doing a field dependent muon spin rotation measurement on C14H18CuN4O10, we wish to estimate the field variation of K, and consequently, the kind of interaction (repulsive/attractive) that may be at play.
DOI: 10.3535/67h-eg2-dgc
title: Aesculus glabra Willd.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/gzv-jdp-wp7
title: Pseudotsuga menziesii (Mirb.) Franco

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310338-1
title: Effect of preheating temperature on the macroscopic and microscopic residual stresses in laser-processed bronze matrix composite surface deposits

description: In industrialized nations, wear results in a loss of 27% of the gross national product (GDP) [1]. Thus, creating wear-resistant coatings and improving the way they are produced are crucial. Coatings made of metal matrix composite (MMC) can greatly increase surface wear resistance. Recent developments in laser surface processing have led to the development of the tungsten fused carbides (WSC, comprising WC and W2C) reinforced bronze matrix composite (specifically WSC/CuAl10Ni5Fe4) coating. This new MMC coating has an 80% wear reduction potential [2]. However, a strong temperature gradient and significant thermal expansion mismatch between phases cause the MMC coatings to have both macro (type I) and micro (type II) residual strains. The performance in service of the WSC/bronze composite coating is greatly dependent by these residual stresses. For instance, dimensional distortion of the MMC coating results from the release of residual stresses during the servicing process. Additionally, the fatigue strength [3] and service life of the MMC coating [4] are decreased due to unexpected breaking caused by the superposition of residual stresses and applied stress. For these reasons determining the macro and micro residual stresses is crucial.
DOI: 10.5286/isis.e.rb2320122
title: Understanding the molecular dynamics in the pyrochlore-lattice compound GeCo2O4

description: Free molecules have been employed to describe the spin dynamics in many frustrated magnets, yet their origin remains unexplained. Here we propose a neutron diffuse scattering experiment on WISH to study the prototype pyrochlore-lattice compound GeCo2O4 in which molecular dynamics appear in both the paramagnetic phase and the long-range ordered phase. By comparing the high-resolution diffuse scattering data with the self-consistent Gaussian approximation calculations, we will be able to pin down a fundamental lattice model that may explain the effective free molecular models in GeCo2O4 and the related compounds.
DOI: 10.5286/isis.e.rb2320122-1
title: Understanding the molecular dynamics in the pyrochlore-lattice compound GeCo2O4

description: Free molecules have been employed to describe the spin dynamics in many frustrated magnets, yet their origin remains unexplained. Here we propose a neutron diffuse scattering experiment on WISH to study the prototype pyrochlore-lattice compound GeCo2O4 in which molecular dynamics appear in both the paramagnetic phase and the long-range ordered phase. By comparing the high-resolution diffuse scattering data with the self-consistent Gaussian approximation calculations, we will be able to pin down a fundamental lattice model that may explain the effective free molecular models in GeCo2O4 and the related compounds.
DOI: 10.3535/517-56r-z24
title: Astelia Banks & Sol. ex R.Br.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/l8s-fme-85b
title: Ranunculus chius DC.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220773
title: Crystal field excitations of the quasi-two-dimensional van der Waals system Ce2Te5
DOI: 10.5286/isis.e.rb2220773-1
title: Crystal field excitations of the quasi-two-dimensional van der Waals system Ce2Te5
DOI: 10.5286/isis.e.rb2310338
title: Effect of preheating temperature on the macroscopic and microscopic residual stresses in laser-processed bronze matrix composite surface deposits

description: In industrialized nations, wear results in a loss of 27% of the gross national product (GDP) [1]. Thus, creating wear-resistant coatings and improving the way they are produced are crucial. Coatings made of metal matrix composite (MMC) can greatly increase surface wear resistance. Recent developments in laser surface processing have led to the development of the tungsten fused carbides (WSC, comprising WC and W2C) reinforced bronze matrix composite (specifically WSC/CuAl10Ni5Fe4) coating. This new MMC coating has an 80% wear reduction potential [2]. However, a strong temperature gradient and significant thermal expansion mismatch between phases cause the MMC coatings to have both macro (type I) and micro (type II) residual strains. The performance in service of the WSC/bronze composite coating is greatly dependent by these residual stresses. For instance, dimensional distortion of the MMC coating results from the release of residual stresses during the servicing process. Additionally, the fatigue strength [3] and service life of the MMC coating [4] are decreased due to unexpected breaking caused by the superposition of residual stresses and applied stress. For these reasons determining the macro and micro residual stresses is crucial.
DOI: 10.3535/5af-wej-xcq
title: Ranunculus chius DC.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/v18-hy1-wgw
title: Orchis variegata All.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220683-4
title: Spin Wave Dispersion in Perovskite Nickelates
DOI: 10.5286/isis.e.rb2310137
title: µSR study in superconducting state of nonsymmorphic compounds TIrGe (T = Ti, Zr, and Hf)

description: The search for novel topological phases, including topological semimetals (TSM) and topological superconductivity, has focused a significant amount of attention on the nonsymmorphic space group symmetry, which includes screw axis and glide plane symmetries. Recently, time-reversal symmetry breaking (TRSB) has been found in equiatomic ternary compounds, with Dirac point degeneracy protected by its nonsymmorphic crystal structure symmetry. The interplay of non-trivial band structure and strong spin-orbital coupling is believed to be responsible for the unconventional superconducting ground state in these compounds; however, the exact pairing mechanism is unknown. In this proposal, we propose to investigate the superconducting ground state of a new family of nonsymmorphic compounds.
DOI: 10.5286/isis.e.rb2310137-1
title: µSR study in superconducting state of nonsymmorphic compounds TIrGe (T = Ti, Zr, and Hf)

description: The search for novel topological phases, including topological semimetals (TSM) and topological superconductivity, has focused a significant amount of attention on the nonsymmorphic space group symmetry, which includes screw axis and glide plane symmetries. Recently, time-reversal symmetry breaking (TRSB) has been found in equiatomic ternary compounds, with Dirac point degeneracy protected by its nonsymmorphic crystal structure symmetry. The interplay of non-trivial band structure and strong spin-orbital coupling is believed to be responsible for the unconventional superconducting ground state in these compounds; however, the exact pairing mechanism is unknown. In this proposal, we propose to investigate the superconducting ground state of a new family of nonsymmorphic compounds.
DOI: 10.3535/jkz-tcx-226
title: Orchis variegata All.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/y5w-mvp-y9x
title: Ranunculus muricatus L.

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