Physics of rare earth - transition metal permanent magnets: theory of their magnetostriction
Permanent magnets are pervasive in both established and developing technologies and are found in motors and generators, transducers, magnetomechanical devices and magnetic field and imaging systems. They are also both fascinating and challenging in terms of their fundamental materials physics. At the Universities of Warwick and Birmingham we are launching (January 2016) an integrated programme to uncover key design principles and are looking for postgraduate students to participate. For the theory side of our EPSRC-funded PRETAMAG project (""Investigations of the Physics underlying the principles of design of Rare Earth Transition metAl permanent MAGnets"") we are looking for a postgraduate student to help develop the theory for important magneto-structural effects. The project will involve condensed matter physics theory and high performance computing.
One of the group of magnets which we will investigate exhibits giant magnetostriction - a strong coupling between magnetism and structure. The PhD project will be directed at this topic. The easy axis of the magnet DyFe2 lies along , whereas for the same crystal structure, swapping Dy for Tb changes this to . Tb(1-x)Dy(x)-Fe2 crystals, near the crossover in behaviour, show large magnetoelasticity which makes the material a leading magnetostrictive material for many applications. We will explore how to improve its properties. Recent experimental measurements at Birmingham  have revealed some fascinating features. This PhD project will develop the theory for magnetoelastic effects and compare the results with experimental data. It will show how elastic and magnetic degrees of freedom soften, and inform the design of new compounds.
A full 3.5 year studentship for UK students (fees and maintenance) is available. Candidates should hold or expect to hold a 1st (or high 2.1) in Physics or related subject area.
Applications are accepted at any time, but it is likely that interviews will be from later January onwards.
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How good is research at University of Warwick in Physics?
FTE Category A staff submitted: 54.60
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