51 research outputs found
Spin wave assisted current induced magnetic domain wall motion
The interaction between the propagating spin waves and the current driven
motion of a transverse domain wall in magnetic nanowires is studied by
micromagnetic simulations. If the speed of domain walls due to current induced
spin transfer torque is comparable to the velocity driven by spin waves, the
speed of domain wall is improved by applying spin waves. The domain wall
velocity can be manipulated by the frequency and amplitude of spin waves. The
effect of spin waves is suppressed in the high current density regime in which
the domain wall is mostly driven by current induced spin transfer torque
Observation of magnetocapacitance in ferromagnetic nanowires
The authors have investigated magnetic domain wall induced capacitance
variation as a tool for the detection of magnetic reversal in magnetic
nanowires for in-plane (NiFe) and out-of-plane (Co/Pd) magnetization
configurations. The switching fields in the capacitance measurements match with
that of the magnetoresistance measurements in the opposite sense. The origin of
the magnetocapacitance has been attributed to magnetoresistance. This
magnetocapacitance detection technique can be useful for magnetic domain wall
studies
Effect of nonadiabatic spin transfer torque on domain wall resonance frequency and mass
The dynamics of a magnetic domain wall in a semi circular nanowire loop is
studied by an analytical model and micromagnetic simulations. We find a damped
sinusoidal oscillation of the domain wall for small displacement angles around
its equilibrium position under an external magnetic field in the absence of
currents. By studying the effect of current induced nonadiabatic spin transfer
torque on the magnetic domain wall resonance frequency and mass, a red shift is
found in the resonance frequency and domain wall mass increases by increasing
the ratio of nonadiabatic spin torque to adiabatic contribution above 1
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