William G. Van der Sluys, Alfred P. Sattelberger, et al.
Polyhedron
In this work we demonstrate control of the spin-torque resonance frequency of a domain wall (DW) in a notched wire through the lithographic engineering of the shape and profile of the notch. By modeling the magnetization dynamics of a current-driven domain wall in a nanometric constrained geometry, an almost harmonic pinning potential has been designed, and we experimentally demonstrate the operation of domain wall resonators with well-defined, selectable resonance frequencies, suitable for application in zero magnetic field. These results show that the DW may be treated to a good approximation as a quasiparticle acted on by a restoring force that may be derived from the notch shape in a physically transparent manner. © 2010 The American Physical Society.
William G. Van der Sluys, Alfred P. Sattelberger, et al.
Polyhedron
A. Nagarajan, S. Mukherjee, et al.
Journal of Applied Mechanics, Transactions ASME
M. Hargrove, S.W. Crowder, et al.
IEDM 1998
A. Ney, R. Rajaram, et al.
Journal of Magnetism and Magnetic Materials