Research Background: The group has built up a suite of novel characterisation tools for Functional Magnetic Materials over many years.
a) Materials for Energy Efficient and Environmentally Friendly Heating and Cooling
We are currently funded through an Innovate UK grant together with Camfridge UK to bring magnetic materials closer to application for domestic refrigeration. We have recently participated in a European wide programme on solid state magnetic cooling (DRREAM) and an EPSRC programme grant on materials for energy applications. We use our unique characterisation tools to study the magnetic, thermal and magnetocaloric properties of a range of materials.
We have recently begun a new collaboration with the Universities of Cambridge, Glasgow and Birmingham to explore hybrid organic-inorganic composite materials for barocaloric heating and cooling.
b) Spin Triplet Superconductivity
We have developed methodology together with collaborators at Cambridge University to detect formation of pure spin currents within superconductors using ferromagnetic resonance based spin pumping. In particular we have been interested in forming a better understanding of the interfacial conditions that promote the long range proximity induced spin triplet channel.
c) Antiperovskite antiferromagnetic nitrides
Our focus has primarily been to study thin film Mn3NiN which is a non-collinear frustrated antiferromagnetic system. In recent times we have studied the properties of this material in thin film form grown by pulsed laser deposition. The magneto-optic, magneto-transport and magneti-thermal properties are governed by the topology of the band structure. The material family lends itself to spintronic application due to these properties as well as demonstration of piezomagnetism.
Research Student Supervision
Brown,L, Thermal and electrical properties od carbon nanotubes
Cowie,A, A Study of the Microwave Power dependance in HTS thim Films
Ghosh,IS, Microwave Losses of HTS thin films induced by High Magnetic Field
Hossain,AKM, Investigation of the Colassal Magnetoresistance bulk and Thick Film Manganites
Hudson,P, Transport and MFM of CMR
Malde,N, Ramon Spectroscopy of cuprate and manganite oxides
Miyoshi,Y, Point Contact Spectroscopy
Moore,J, Critical fields in MgB2
Purnell,A, Nonlinear effects in HTS Thin Films
Totty,J, Vortex Dynamics in the Cuprate Superconductors
Yates,K, Microwave properties of Manganites