TiO2 nanotube arrays are promising candidates for applications such as photocatalysis and for potential employment in spin-electronic (spintronic) devices. The functionality of TiO2 -based nanotubes is highly dependent on their structure (microstructure and crystallographic symm…
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The formation of magnetic order in solids is a complex and subtle issue. There are a wide range of different types of magnetisation, all of which may be favoured under different circumstances. In this thesis we consider a novel combination of ideas where the formation of spatial…
Sr₃Ru₂O₇ is a quasi-two-dimensional metal and has a paramagnetic ground state that is heavily renormalised by electron-electron correlations and magnetic exchange interactions. Inextricably linked to this renormalisation is the metamagnetism of Sr₃Ru₂O₇ - a rapid rise in uniform…
A fundamental question in martian geology is whether bolide impact(s) or mantle convection caused the hemispheric dichotomy. Cross-cutting and superposed crustal features interpreted from the MGS topography, magnetic observations, gravity anomalies, and crustal thickness estimat…
The dynamic thermal boundary represented by granoblastic dikes within oceanic dike complexes provides an ideal example of systems wherein intensive thermal and hydrothermal alteration processes make visual image analysis of grain size challenging. Classic image analysis methods …
The work presented in this thesis was broadly focussed on the investigation of the magnetic behaviour of different superconducting materials in the form of bulk (singe crystals and pellets) and thin films (nanomagnetic devices like superconducting spin valves etc). Neutrons and m…
Micro Hall probe magnetometry has been used to investigate the magnetisation of various electrodeposited microcrystals. Superconducting tin crystals of almost perfect square cuboid shapes exhibit a strong size dependence of the supercooling of the superconducting state and, for …
A way to obtain materials that show novel phenomena is to explore the interplay between geometry and interactions. When it is not geometrically possible to satisfy all the interactions by a given configuration, then to find the ground state becomes very complicated. This interpl…