Photo of Mr Angus Laurenson

Mr Angus Laurenson

PhD Project

PhD Project

Spin-wave interference in magnonic structure: Bragg scattering and beyond

Supervisors: Volodymyr Kruglyak, Jacopo Bertolotti

Magnons are the quasi particle of spin waves; oscillations in orientation of atomic magnetic moments in a crystal. The low energy, short wavelength, long phase coherence length and high frequencies make magnons a promising candidate for information processing technologies to replace combined metal oxide transistor based devices. Just as electrons are the principal focus in electronics, magnoncs are the principal focus in the younger field of magnonics [1]. Patterning magnetic materials at the sub micron scale allows the creation of magnetic meta materials with properties beyond that of bulk samples. In particular arrays of antidots patterned into magnetic films are thought to have potential applications ranging from data storage, to a reconfigurable network of magnonic wave guides.

In this context we address the question of how spin waves propagate through patterned magnetic films and how we can engineer new magnonic crystals with functionality desireable in magnonic devices.

1. V. V. Kruglyak, S. O. Demokritov, D. Grundler, Magnonics, J. Phys. D: Appl. Phys. 43, 264001 (2010).