Thomas C. Hansen
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View article: Structural changes of iron active sites in zeolite FER during CO2 and CH4 conversion to oxygenates
Structural changes of iron active sites in zeolite FER during CO2 and CH4 conversion to oxygenates Open
View article: Stepwise Reduction of Ruthenium and Growth of Magnetic Structure During Hydrothermal Crystallisation of SrRu <sub>2</sub> O <sub>6</sub> from KRuO <sub>4</sub>
Stepwise Reduction of Ruthenium and Growth of Magnetic Structure During Hydrothermal Crystallisation of SrRu <sub>2</sub> O <sub>6</sub> from KRuO <sub>4</sub> Open
Using a new design of hydrothermal reactor constructed from a null‐scattering TiZr alloy in situ powder neutron diffraction data are collected to follow the crystallisation of the Ru(V)‐containing high temperature antiferromagnet SrRu 2 O …
View article: Stepwise Reduction of Ruthenium and Growth of Magnetic Structure During Hydrothermal Crystallisation of SrRu <sub>2</sub> O <sub>6</sub> from KRuO <sub>4</sub>
Stepwise Reduction of Ruthenium and Growth of Magnetic Structure During Hydrothermal Crystallisation of SrRu <sub>2</sub> O <sub>6</sub> from KRuO <sub>4</sub> Open
Using a new design of hydrothermal reactor constructed from a null‐scattering TiZr alloy in situ powder neutron diffraction data are collected to follow the crystallisation of the Ru(V)‐containing high temperature antiferromagnet SrRu 2 O …
View article: The bound coherent neutron scattering lengths of the lanthanoids Pr, Nd, Sm, Eu, Yb and several of their isotopes as determined by neutron Bragg powder diffraction
The bound coherent neutron scattering lengths of the lanthanoids Pr, Nd, Sm, Eu, Yb and several of their isotopes as determined by neutron Bragg powder diffraction Open
We have determined the bound coherent neutron scattering lengths b_c of nuclides 141Pr, isoNd (iso = 142, 143, 144, 145, 146, 148, 150), isoSm (iso = 147, 148, 150, 152, 154), 153Eu, 170Yb and 174Yb as well as the natural elements natEu an…
View article: Volatile loss during heating of lunar mare simulants and related compositions
Volatile loss during heating of lunar mare simulants and related compositions Open
View article: Direct observation of an 80 K colossal barocaloric temperature change in one cycle of pressure application and release
Direct observation of an 80 K colossal barocaloric temperature change in one cycle of pressure application and release Open
Solid refrigerants are one of the candidate materials for future cooling technologies aimed at suppressing global warming. Among them, barocaloric solid refrigerants are drawing attention owing to their high caloric performance. Herein, we…
View article: Aqueous Synthesis of Strontium Ruthenate(VI) Oxyhydroxides and Their Crystal Structure Solution from Microcrystals
Aqueous Synthesis of Strontium Ruthenate(VI) Oxyhydroxides and Their Crystal Structure Solution from Microcrystals Open
Investigation of the earliest stages of hydrothermal reactions between KRuO4 and either Sr(NO3)2 or SrO2 allows the isolation of phase-pure SrRuO3(OH)2, a hitherto uncharact…
View article: Comprehensive study of Mn/Ni ordering in LiNi0.5-xMn1.5+xO4 using neutron powder diffraction and scanning transmission electron microscopy
Comprehensive study of Mn/Ni ordering in LiNi0.5-xMn1.5+xO4 using neutron powder diffraction and scanning transmission electron microscopy Open
International audience
View article: Revisiting <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>Na</mml:mtext><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mtext>CoO</mml:mtext><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>: A renewed magnetic phase diagram based on electrochemical reaction synthesis
Revisiting : A renewed magnetic phase diagram based on electrochemical reaction synthesis Open
The assertion of intrinsic material properties based on measured experimental data is being challenged by emerging sample synthesis protocols, which opens new avenues for discovering novel functionalities. In this study, we revisit one of …
View article: Reinvestigation of the bound coherent neutron scattering lengths of lithium and its isotopes using neutron Bragg powder diffraction and neutron interferometry
Reinvestigation of the bound coherent neutron scattering lengths of lithium and its isotopes using neutron Bragg powder diffraction and neutron interferometry Open
The quality of neutron scattering studies relies upon accurately determined bound coherent neutron scattering lengths b c , whose standard tabulated values can be in need of review. We have measured integrated Bragg peak intensities via ne…
View article: Unveiling the Fluorination Pathway of Ruddlesden–Popper Oxyfluorides: A Comprehensive <i>In Situ</i> X-ray and Neutron Diffraction Study
Unveiling the Fluorination Pathway of Ruddlesden–Popper Oxyfluorides: A Comprehensive <i>In Situ</i> X-ray and Neutron Diffraction Study Open
Ruddlesden-Popper oxyfluorides exhibit unique properties, but their synthesis is often hindered by low thermodynamic stability. To overcome this challenge, understanding the formation mechanism of these materials is crucial for optimizing …
View article: Emergent Polar Metal Phase in a Van der Waals Mott Magnet
Emergent Polar Metal Phase in a Van der Waals Mott Magnet Open
We report the emergence of a polar metal phase in layered van der Waals compound FePSe$_3$. This Mott insulator with antiferromagnetic order offers a unique opportunity to fully tune an insulator into a polar metal state with pressure, wit…
View article: A Manufacturing Technique for Binary Clathrate Hydrates for Cold and Very Cold Neutron Production
A Manufacturing Technique for Binary Clathrate Hydrates for Cold and Very Cold Neutron Production Open
Intense sources of very cold neutrons (VCNs) would be beneficial for various neutron scattering techniques and low-energy particle physics experiments. Binary clathrate hydrates hosting deuterated tetrahydrofuran (THF-d) and dioxygen show …
View article: Phase equilibrium during the synthesis of LiNi<sub>0.46</sub>Mn<sub>1.54</sub>O<sub>4</sub>: comprehensive X-ray & neutron powder diffraction study
Phase equilibrium during the synthesis of LiNi<sub>0.46</sub>Mn<sub>1.54</sub>O<sub>4</sub>: comprehensive X-ray & neutron powder diffraction study Open
A complex phase equilibrium between spinel, layered and rock-salt type oxide phases revealed combining synchrotron X-ray and neutron powder diffractions during the synthesis of LiNi 0.46 Mn 1.54 O 4 (LNMO) powders from a reagent mixture.
View article: High-pressure synthesis and neutron scattering study of tantalum hydride <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>TaH</mml:mi><mml:mrow><mml:mn>1.23</mml:mn><mml:mo>(</mml:mo><mml:mn>5</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:msub></mml:mrow></mml:math> and a tantalum polymorph with A15-type structure
High-pressure synthesis and neutron scattering study of tantalum hydride and a tantalum polymorph with A15-type structure Open
A unique type of tantalum hydride was synthesized by exposing tantalum dihydride to the high hydrogen pressure of 9 GPa and a temperature of 580∘C using toroid-type high-pressure chambers. The samples of this hydride were cooled down to 10…
View article: Manipulating the decomposition kinetics of a mixed carbide through small compositional adjustments
Manipulating the decomposition kinetics of a mixed carbide through small compositional adjustments Open
View article: Mechanochemical Synthesis and Magnetic Properties of the Mixed-Valent Binary Silver(I,II) Fluorides, Ag<sup>I</sup><sub>2</sub>Ag<sup>II</sup>F<sub>4</sub> and Ag<sup>I</sup>Ag<sup>II</sup>F<sub>3</sub>
Mechanochemical Synthesis and Magnetic Properties of the Mixed-Valent Binary Silver(I,II) Fluorides, Ag<sup>I</sup><sub>2</sub>Ag<sup>II</sup>F<sub>4</sub> and Ag<sup>I</sup>Ag<sup>II</sup>F<sub>3</sub> Open
Fluoridoargentates(II) represent a fascinating class of silver(II) compounds with structural and magnetic similarities to cuprate superconductors. However, their synthesis is challenging, leaving their properties largely underexplored and …
View article: Impact of Mn/Ni and Li/(Mn+Ni) ratios on phase equilibrium and electrochemical performance of the high voltage spinel LiNi0.5Mn1.5O4
Impact of Mn/Ni and Li/(Mn+Ni) ratios on phase equilibrium and electrochemical performance of the high voltage spinel LiNi0.5Mn1.5O4 Open
View article: Systematics of zircaloy-4 lattice parameters from 2 K to PWR irradiation conditions
Systematics of zircaloy-4 lattice parameters from 2 K to PWR irradiation conditions Open
View article: Quantifying the Hydration‐Dependent Dynamics of Cu Migration and Activity in Zeolite Omega for the Partial Oxidation of Methane
Quantifying the Hydration‐Dependent Dynamics of Cu Migration and Activity in Zeolite Omega for the Partial Oxidation of Methane Open
Copper‐exchanged zeolite omega (Cu‐omega) is a potent material for the selective conversion of methane‐to‐methanol (MtM) via the oxygen looping approach. However, its performance exhibits substantial variation depending on the operational …
View article: Quantifying the Hydration‐Dependent Dynamics of Cu Migration and Activity in Zeolite Omega for the Partial Oxidation of Methane
Quantifying the Hydration‐Dependent Dynamics of Cu Migration and Activity in Zeolite Omega for the Partial Oxidation of Methane Open
Copper‐exchanged zeolite omega (Cu‐omega) is a potent material for the selective conversion of methane‐to‐methanol (MtM) via the oxygen looping approach. However, its performance exhibits substantial variation depending on the operational …
View article: Sharp quantum phase transition in the frustrated spin-1/2 Ising chain antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CaCoV</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>7</mml:mn></mml:msub></mml:mrow></mml:math>
Sharp quantum phase transition in the frustrated spin-1/2 Ising chain antiferromagnet Open
We report on a quantum critical behavior in the quasi-1D spin-1/2 zigzag frustrated chain antiferromagnet CaCoV2O7, induced by an applied magnetic field. Below TN=3.3 K our zero-field neutron diffraction studies revealed the up-up-down-dow…
View article: Magnetic and structural properties of the iron silicide superconductor LaFeSiH
Magnetic and structural properties of the iron silicide superconductor LaFeSiH Open
International audience
View article: Phase-field determination of NaSICON materials in the quaternary system Na2O-P2O5-SiO2-ZrO2: II. Glass-ceramics and the phantom of excessive vacancy formation
Phase-field determination of NaSICON materials in the quaternary system Na2O-P2O5-SiO2-ZrO2: II. Glass-ceramics and the phantom of excessive vacancy formation Open
This work focuses on a very narrow region in the quaternary system Na2O-P2O5-SiO2-ZrO2 to explore the occasionally proposed deficiency in zirconium and oxygen content of Na+ super-ionic conductor (NaSICON) materials. In addition, this regi…
View article: Ce- and Ni-Codoped Double PrBaMn<sub>2</sub>O<sub>5</sub> Perovskite as a Ceramic SOFC Anode
Ce- and Ni-Codoped Double PrBaMn<sub>2</sub>O<sub>5</sub> Perovskite as a Ceramic SOFC Anode Open
This study explores the efficacy of cerium introduction, both on its own and in combination with nickel, into PrBaMn2O5+δ (PBM) structures to enhance solid oxide fuel cell (SOFC) anodes. We synthesized Pr1–x
View article: Mechanochemical Synthesis and Magnetic Properties of the Mixed-Valent Binary Silver(I,II) Fluorides, AgI2AgIIF4 and AgIAgIIF3
Mechanochemical Synthesis and Magnetic Properties of the Mixed-Valent Binary Silver(I,II) Fluorides, AgI2AgIIF4 and AgIAgIIF3 Open
Fluoridoargentates(II) represent a fascinating class of silver(II) compounds that exhibit structural and magnetic similarities to cuprate superconductors. However, their synthesis is challenging, leaving their properties largely unexplored…
View article: Large-cage occupation and quantum dynamics of hydrogen molecules in <i>sII</i> clathrate hydrates
Large-cage occupation and quantum dynamics of hydrogen molecules in <i>sII</i> clathrate hydrates Open
Hydrogen clathrate hydrates are ice-like crystalline substances in which hydrogen molecules are trapped inside polyhedral cages formed by the water molecules. Small cages can host only a single H2 molecule, while each large cage can be occ…
View article: Rearrangement of orbitals in KAgF3 due to Kugel-Khomskii mechanism: a Neutron diffraction and Density Functional Theory study
Rearrangement of orbitals in KAgF3 due to Kugel-Khomskii mechanism: a Neutron diffraction and Density Functional Theory study Open
The crystal structure of KAgF3 was studied by powder neutron diffraction. KAgF3 exhibits at all temperatures an orthorhombic symmetry in space group Pnma that allows for several distortions with respect to the ideal cubic perovskite struct…
View article: Understanding the reaction pathway of lithium borohydride-hydroxide-based multi-component systems for enhanced hydrogen storage
Understanding the reaction pathway of lithium borohydride-hydroxide-based multi-component systems for enhanced hydrogen storage Open
The study examines lithium borohydride-hydroxide systems for hydrogen storage. The LiBH 4 –3LiOH system releases 6 wt% H 2 by 250 °C. Thermal and neutron diffraction provide insights into intermediate phases and a detailed reaction schemat…
View article: Impact of Mn/Ni and Li/(Mn+Ni) Ratios on Phase Equilibrium and Electrochemical Performance of the High Voltage Spinel Lini0.5mn1.5o4
Impact of Mn/Ni and Li/(Mn+Ni) Ratios on Phase Equilibrium and Electrochemical Performance of the High Voltage Spinel Lini0.5mn1.5o4 Open