1 research outputs found
Giant Asymmetry of Domain Walls Propagation in Pd/Co/Pd(111) Epitaxial Structures with Different Interface Roughness
The
motion of domain walls (DWs) in magnetic nanoscale layered
systems attracts a great deal of attention due to the possible chiral
nature of the energy dissipation occurring because of the presence
of strong spin–orbit coupling and the broken inversion symmetry.
Here, we report on a giant asymmetry of DWs propagation in the creep
regime in the Pd/Co/Pd epitaxial system under the influence of driving
out-of-plane (OOP) and symmetry breaking in-plane (IP) magnetic fields.
With an increase in the thickness of the bottom Pd layer, which in
turn leads to growth of the interface roughness of the Pd/Co/Pd samples,
the asymmetry of DWs propagation increases. The maximal reliably measured
relation of the velocities of right-handed and left-handed propagating
DWs in the Pd(12.5)/Co(0.7)/Pd(3) sample, where thickness is in nanometers,
is equal to 6600, which means almost complete blocking of the propagation
of DWs in the direction determined by the appropriate choice of a
combination of the applied magnetic fields. The observed giant asymmetry
of the propagation of DWs indicates the importance of nanoengineering
the parameters of the interfaces to control the propagation of DWs
in magnetic memory and logic devices