Julien Autebert, Aditya Kashyap, et al.
Langmuir
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.
Julien Autebert, Aditya Kashyap, et al.
Langmuir
A.B. McLean, R.H. Williams
Journal of Physics C: Solid State Physics
D.D. Awschalom, J.-M. Halbout
Journal of Magnetism and Magnetic Materials
Xikun Hu, Wenlin Liu, et al.
IEEE J-STARS