%0 Journal Article
%A Yan, Ming
%A Kákay, Attila
%A Hertel, Riccardo
%T Proposal for a direct measurement of the nonadiabatic spin-transfer torque parameter β and the spin-polarization rate P
%J Physical review / B
%V 89
%N 5
%@ 1098-0121
%C College Park, Md.
%I APS
%M FZJ-2015-04174
%P 054415
%D 2014
%X We propose a method to measure the nonadiabatic spin-transfer torque parameter β and the spin-polarization rate P independently. These quantities are crucial for current-driven magnetization processes, but their value could so far hardly be measured. It is shown that the motion of transverse domain walls in cylindrical nanowires, driven by a magnetic field and by an electric current, can be used to extract those values. This domain wall type propagates with a precessional motion around the wire, where the domain wall acts as a magnetic dipole rotating at well-defined frequency. The spin-polarization rate P can be deduced from the current-induced axial motion of the domain wall, while the rotational frequency of the domain wall and its variation with an external field allows one to determine the nonadiabatic spin-transfer torque. This proposal for an experiment to directly measure these quantities is based on analytical calculations and micromagnetic simulations.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000332388700004
%R 10.1103/PhysRevB.89.054415
%U https://juser.fz-juelich.de/record/201880