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Superstructures in insulating and metallic lanthanum-doped sodium cobaltate
The thermoelectric properties of NaxCoO2 can be substantially improved by replacing Na ions by cations of higher valence. Our neutron diffraction studies on SXD for doping with... -
Effect of oxygen vacancies on the phonon dispersion of pyrochlores
The frustrated magnetism of pyrochlores makes them candidates for applications in magnetic cooling and scientific instrumentation, and the proposal that they can be used to... -
Spin-orbit transitions in CoV3O8
Strong orbital mixing resulting from local distortions in the crystal field can mix higher energy orbital states with the ground state. We propose to characterise this mixing in... -
Vibrational density of states in ammonium hexachlorometallates.
The piloting VESUVIO experiments RB820478, RB610497 on (NH4)2PdCl6 and (NH4)2TeCl6 and RB 10067 on (ND4)2PdCl6 have shown that: (i) the H/D dynamics in NH4+/ND4+ is largely... -
Graphene Surface Functionalisation Effect on Hydrogen Spillover
Hydrogen spillover involves dissociation of molecular hydrogen at the surface of metals, particularly transition metals, followed by migration of the hydrogen atoms across the... -
Spin excitations in the non-magnetic ground state of In2Ru2O7
Correlated transition-metal oxides with orbital degeneracy such as ruthenates with d4 (S = 1) configuration offer a plethora of unconventional electronic states. Combined with... -
Complexity in simplicity: disentangling Pb2+ disorder in PbS, PbSe and PbTe
We ask for 5 days on SXD to study the detailed crystal structures of PbS, PbSe and PbTe to resolve long-standing, topical controversies about the detailed behaviour of this... -
Spin orientations in epitaxial Mn2Au films for antiferromagnetic spintronics
Mn2Au has garnered a lot of interest as a promising material for the new field of antiferromagnetic spintronics. The symmetry of the crystal and magnetic order, already... -
Novel quantum spin liquid state in the S=3/2 dimer lattice in Ba3ZnRu2O9
We have discovered a novel type of quantum spin liquid in a hexagonal lattice of Ru5+ dimers in Ba3ZnRu2O9, where any traces of the Curie tail or glassy behavior have not been... -
Short range order in triglycine sulphate above the phase transition temperature
We want to better understand the intermolecular interactions in deuterated triglycine sulphate (DTGS). DTGS is a hydrogen bonded ferroelectric with a second-order, order... -
Multiferroic (Ferroelastic/Magnetic) Phase Transitions in KMnF3
KMnF3 perovskite undergoes 3 structural, and two magnetic phase transitions on cooling from 300 K to 2 K. Above 185 K the compound is in the aristotype structure, on cooling... -
Probing the ground state magnetic structure of single crystalline Mn2V2O7
Mn2V2O7 exhibits reversible structural transition from the high temperature monoclinic phase (C2/m) to low temperature triclinic phase (P-1) near room temperature where Mn2+... -
In-situ neutron diffraction during reversible deuterium loading in under-stoi...
Hydrogen is an efficient energy carrier that can be produced from renewable sources and stored in alloys in solid-state for long period enabling the transition towards CO2-free... -
Order-disorder and phase transitions in the LiFeO2 cathode materials
Despite the importance of the LiFeO2 phases as cathode materials in lithium ion batteries, little is known about their crystal structures, except that they should be based on... -
High Resolution Powder Diffraction of Manganites to Determine Bond Lengths as...
Manganites show promise as magnetocaloric materials - for use in solid-state refrigeration - in terms of cost, durability and tunable thermal conductivity. By tuning the... -
An Investigation of the electric field dependence of the dynamics of the Hydr...
The purpose of this investigation is to investigate the electric field dependence of the dynamics of the melting transition of bulk and confined water with an applied electric... -
A series of robust metal-organic frameworks with exceptional capability for S...
The study of porous metal-organic framework (MOF) materials has attracted considerable attention. We seek to develop new stable MOFs for practical gas separation and request 3... -
Quasi-elastic neutron study of the organic cation dynamics in the halide pero...
Solar cells based on a layer of halide perovskite have recently seen rapid increases in efficiency, with certified values in excess of 20%. The prototypical material of this... -
Tilting transition and dimensionality crossover of anion chain order in Ba1-x...
Transition metal oxynitride perovskites are an emerging class of functional materials. However, their oxide/nitride ordering principles were unclear until a recent study of the... -
Molecular dynamics and melting in CH3NH3PbCl3:
The organic-inorganic perovskites (CH3NH3Pb(Br,Cl,I)3) have been identified as efficient photovoltaic materials. Theoretical calculations have suggested that the low energy...