TY  - JOUR
AU  - Guimaraes, Filipe
AU  - Lounis, S.
AU  - Costa, A. T.
AU  - Muniz, R. B.
TI  - Dynamical current-induced ferromagnetic and antiferromagnetic resonances
JO  - Physical review / B
VL  - 92
IS  - 22
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-07776
SP  - 220410
PY  - 2015
AB  - We demonstrate that ferromagnetic and antiferromagnetic excitations can be triggered by the dynamical spin accumulations induced by the bulk and surface contributions of the spin Hall effect. Due to the spin-orbit interaction, a time-dependent spin density is generated by an oscillatory electric field applied parallel to the atomic planes of Fe/W(110) multilayers. For symmetric trilayers of Fe/W/Fe in which the Fe layers are ferromagnetically coupled, we demonstrate that only the collective out-of-phase precession mode is excited, while the uniform (in-phase) mode remains silent. When they are antiferromagnetically coupled, the oscillatory electric field sets the Fe magnetizations into elliptical precession motions with opposite angular velocities. The manipulation of different collective spin-wave dynamical modes through the engineering of the multilayers and their thicknesses may be used to develop ultrafast spintronics devices. Our work provides a general framework that probes the realistic responses of materials in the time or frequency domain.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000366500100003
DO  - DOI:10.1103/PhysRevB.92.220410
UR  - https://juser.fz-juelich.de/record/279902
ER  -