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Effects of lanthanide and manganese dopants on the crystal structure of BiFeO3
Enhancement of the ferroelectric properties of multiferroic BiFeO3 are known to occur when small amounts of Bi are replaced by lanthanide ions. Further levels of lanthanide... -
In search of origin of metal-insulator transition in honeycomb structure Li2RuO3
Recently we have carried out inelastic neutron scattering measurements on Li2RuO3 to understand the nature of the phase transition at 550K. We have seen a clear inelastic... -
Structure-Property Relationships in Oxide Ion Conductors: Bi6WO12
High temperature Bi2O3 has the highest oxide ion conductivity known for any material. It has an oxygen-deficient fluorite-based structure, with 25% of oxygen atoms missing from... -
Phase Diagram of Ba1-xKxFe2As2
In the new class of iron pnictide superconductors, there is evidence of phase coexistence close to the phase boundary between the SDW and superconducting order produced by hole... -
An investigation of water incorporation in K2NiF4 systems, and phosphate dope...
The drive for increasing energy efficiency and reducing greenhouse gas emissions has garnered increasing support for the use of fuel cell technology, which offers the potential... -
Some Ferroic Perovskite Solid Solutions
We are examining various perovskite solid solutions based on NaNbO3 or BiFeO3 that havepromising ferroelectric or multiferroic properties. All of these solid solutions show... -
Complex structures and phase transition in mixed metal gallates: High-resolut...
Decastrontium hexagallate Sr10Ga6O19 exhibits very complex structural behaviour as a function of temperatur. The known room-temperature structure is incommensurately modulated.... -
Variable Temperature Studies of the Novel Multiferroic Tetragonal Tungsten Br...
Recently there has been a renaissance in the investigation of materials which simultaneously exhibit magnetic and electric ordering with these materials expected to find... -
Environmental Apatites
Materials adopting the apatite structure are gaining an increasing importance as potential solid-oxide fuel cell electrolytes and for the chemical stabilisation of high level... -
Magnetoelastic coupling effect on multiferroic behaviors in different types o...
We propose to perform high resolution neutron diffraction on powder samples of the frustrated antiferromagnets Ag1-xCuxFe1-yGayO2 using HRPD. CuFe1-yGayO2 and AgFeO2 have... -
Re-examination of PZT structures around a tricritical point
The mixture of lead titanate (PbTiO3) and lead zirconate (PbZrO3), known as PbZr1-xTixO3 (PZT), is commonly used in a wide range of applications (sensors, actuators, etc)... -
Application of Superpace methods to long period Perovskite superstructures
Recently there have been considerable several reports of ¿nanostructured¿ perovskite oxides. In order to obtain detailed knowledge of the factors controlling the formation of... -
High resolution neutron diffraction studies of lanthanide zirconolites
The aim of this experiment is to determine high quality structural models for pyrochlore and zirconolite phases in the Y2Ti2-2xFexNbxO7 and Y2-xCexTi2-xFexO7 solid solutions,... -
Investigation of the Li-intercalation mechanism for the perovskite Li0.18Sr0....
Our work on LSTN showed that it exhibits favourable electrochemical properties, i.e. rapid diffusion of lithium into the structure at low temperatures and the ability to... -
In-situ High Temperature Studies of BiFeO3 in a Stabilising Oxygen Atmosphere
The drive to find novel materials for applications such as data storage has led to a resurgence in research into multiferroic materials. Bismuth ferrite is the most widely... -
Structural Studies of PbZr1-xTixO3: completing the puzzle in the tetragonal a...
We request 6 days of HRPD time in order to study the structures on the tetragonal side of the lead zirconate-titanate (PZT) phase diagram, a region that has so far been rather... -
Impact of Jahn-Teller Distortions in Sr0.5Pr0.5MnO3
We propose to use the HRPD to establish the sequence of structures, and the nature of the transitions between these, in two complex manganites Sr0.5Pr0.5MnO3 and... -
Phase Separation and Jahn Teller Distortion in Molybdate Perovskites
Two days of beamtime on HRPD will be used to examine a family of double perovskites Sr2YbMO6 that are isostructural at room temperature. When M = Mo5+ the monoclinic perovskite... -
Define the crystal structures of lead-free ferroelectric, candidate multiferr...
We have a range of new structures in the lead-free ferroelectric, candidate multiferroic and SOFC cathode areas. The HRPD data will be used to define these new crystal... -
CaTiO3 cooling from 291 K 30-130 ms jaws 15*20
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