Nano Express
Magnonic band structure investigation of one-dimensional bi-component magnonic crystal waveguides
Author affiliations
Department of Physics, National University of Singapore, Singapore, 117542, Singapore
Citation and License
Nanoscale Research Letters 2012, 7:498 doi:10.1186/1556-276X-7-498
Published: 4 September 2012Abstract
The magnonic band structures for exchange spin waves propagating in one-dimensional magnonic crystal waveguides of different material combinations are investigated using micromagnetic simulations. The waveguides are periodic arrays of alternating nanostripes of different ferromagnetic materials. Our results show that the widths and center frequencies of the bandgaps are controllable by the component materials, the stripe widths, and the orientation of the applied magnetic field. One salient feature of the bandgap frequency plot against stripe width is that there are n-1 zero-width gaps for the nth bandgap for both transversely and longitudinally magnetized waveguides. Additionally, the largest bandgap widths are primarily dependent on the exchange constant contrast between the component materials of the nanostructured waveguides.
