TY  - JOUR
AU  - Sluka, V.
AU  - Kákay, A.
AU  - Deac, A. M.
AU  - Bürgler, D. E.
AU  - Hertel, R.
AU  - Schneider, C. M.
TI  - Quenched Slonczewski windmill in spin-torque vortex oscillators
JO  - Physical review / B
VL  - 86
IS  - 21
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2014-00635
SP  - 214422
PY  - 2012
AB  - We present a combined analytical and numerical study on double-vortex spin-torque nano-oscillators and describe a mechanism that suppresses the windmill modes. The magnetization dynamics is dominated by the gyrotropic precession of the vortex in one of the ferromagnetic layers. In the other layer, the vortex gyration is strongly damped. The dominating layer for the magnetization dynamics is determined by the sign of the product between sample current and the chiralities. Measurements on Fe/Ag/Fe nanopillars support these findings. The results open up a new perspective for building high quality-factor spin-torque oscillators operating at selectable, well-separated frequency bands.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000312674200005
DO  - DOI:10.1103/PhysRevB.86.214422
UR  - https://juser.fz-juelich.de/record/150586
ER  -