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Lattice dynamics in magnetoelectric HoMnO3
The manipulation of magnetic properties electronically is of great importance in modern computing. Current technology uses electric currents which draws a relatively large... -
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... -
Magnetic and charge ordering, superstructures and diffuse scattering in de-in...
Sodium Cobaltate has a complex phase diagram, exhibiting various phenomena and a kaleidoscope of superlattice diffraction patterns as the concentration of sodium is varied. It... -
Phonon dispersion and defects in pyrochlores
Pyrochlores exhibit a rich variety of exotic physical properties including fractionalization, topological order and emergent magnetic monopoles in the classical spin ices, and a... -
Do defect structures in the pyrochlore Tb2Ti2O7 control hidden order or the t...
The rare earth pyrochlores have been at the forefront of research into exotic magnetic phenomena for some years. In general they are of interest because they are frustrated -... -
Lattice dynamics in magnetoelectric HoMnO3
The manipulation of magnetic properties electronically is of great importance in modern computing. Current technology uses electric currents which draws a relatively large... -
Magnetic excitations in AgCrSe2
AgCrSe2 has emerged as a material of great interest due it its good thermoelectric performance. It also has an interesting cycloidal magnetic structure. While studying the... -
Li-ion diffusion in the solid electrolyte LLT
The high voltage and energy density has made lithium-ion batteries ubiquitous in portable electronics, such as iPods, laptops and mobile phones. At present, they are typically... -
Rattling modes in new thermoelectrics
NaxCoO2 has an exceptional combination of thermoelectric properties, including low thermal conductivity, and it is currently under consideration for use in power recovery and as... -
Intrinsic defect structures in zinc oxide
Zinc oxide is an important semiconductor material used in a wide range of industrial applications, many of which require both n-type and p-type components. It can easily be... -
Dependence of magnetic exchange on superstructure in sodium cobaltate
We are able to grow large single crystals of Na0.8CoO2 and to control the sodium superstructure via the cooling rate. Quenching rapidly to low temperature gives a striped phase,... -
Phonon scattering and the thermal conductivity of zinc oxide
Understanding the thermal conductivity of zinc oxide is of central importance in assessing its potential for a wide variety of applications in optoelectronics, power electronics... -
Superstructures in lithium cobaltate
The battery material LixCoO2 has recently been shown to have high thermopower comparable to NaxCoO2 at high x. In the case of NaxCoO2 we showed using neutron Laue diffraction on... -
The origin of ultra-low thermal conductivity in the thermal barrier material ...
Thermal barrier materials are used in modern turbines to enable them to run above the melting temperature of the turbine blades. However, to go to higher temperatures (and... -
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... -
Magnon-phonon coupling in magnetoelectric HoMnO3
The manipulation of magnetic properties electronically is of great importance in modern computing. Current technology uses electric currents which draws a relatively large... -
Lattice dynamics in magnetoelectric HoMnO3
The manipulation of magnetic properties electronically is of great importance in modern computing. Current technology uses electric currents which draws a relatively large... -
Phonon dispersion and defects in pyrochlores
Pyrochlores exhibit a rich variety of exotic physical properties including fractionalization, topological order and emergent magnetic monopoles in the classical spin ices, and a...
