Magnon caustics


Contact Professor B J Hickey to discuss this project further informally.

Project description

Magnons are the quantised excitations of magnetistion and are also known as spin waves.  Magnons can be used to carry information and, as they are waves, they can be added and manipulated in ways that are similar to photons. 

The typical wavelength range for magnons in ferromagnets is from nm up to microns and this offers an exciting possibility: by patterning an appropriate material at the right length scale, a magnonic crystal can be made.  In this structure the magnon interference will give rise to well-known dispersion phenomena such as band gaps and variations of group velocity.  The dispersion means that the magnon wavevector can be controlled and the energy is determined by the excitation frequency and hence, control of the magnons is possible. 

Particularly interesting is the opportunity of controlling caustics where the direction of phase and group velocities is not coincident – which usually occurs when there is an anisotropy in the medium.  The cusp of a caustic has a very high intensity and could be a way of focusing spin waves.  This PhD project will aim to discover the underlying physics of these phenomena. 

Entry requirements

Applications are invited from candidates with, or expecting, a minimum of a UK upper second class honours degree (2:1) in a relevant discipline, a Master's degree in a relevant discipline, or both.

Additional staff contact

O Cespedes (CM)

How to apply

Formal applications for research degree study should be made online through the university's website. Please state clearly in the research information section that the PhD you wish to be considered for is 'Magnon caustics' as well as Professor B J Hickey as your proposed supervisor.

If English is not your first language, you must provide evidence that you meet the University’s minimum English Language requirements.

If you require any further information please contact the Graduate School Office

We welcome scholarship applications from all suitably-qualified candidates, but UK black and minority ethnic (BME) researchers are currently under-represented in our Postgraduate Research community, and we would therefore particularly encourage applications from UK BME candidates.  All scholarships will be awarded on the basis of merit.