Micro-Structured Ferromagnetic Tubes for Spin Wave Excitation

Details Micro-Structured Ferromagnetic Tubes for Spin Wave Excitation Micro-Structured Ferromagnetic Tubes for Spin Wave Excitation

2010-09-25

arxiv.org/abs/1009.4986v1

Physics

Condensed Matter

Other Condensed Matter

3 pages, 3 figures

Scientific paper

Micron scale ferromagnetic tubes placed on the ends of ferromagnetic CoTaZr spin waveguides are explored in order to enhance the excitation of Backward Volume Magnetostatic Spin Waves. The tubes produce a closed magnetic circuit about the signal line of the coplanar waveguide and are, at the same time, magnetically contiguous with the spin waveguide. This results in a 10 fold increase in spin wave amplitude. However, the tube geometry distorts the magnetic field near the spin waveguide and relatively high biasing magnetic fields are required to establish well defined spin waves. Only the lowest (uniform) spin wave mode is excited.

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