TY  - JOUR
A1  - Zaks, Michael A.
A1  - Pikovskij, Arkadij
T1  - Synchrony breakdown and noise-induced oscillation death in ensembles of serially connected spin-torque oscillators
JF  - The European physical journal : B, Condensed matter and complex systems
N2  - We consider collective dynamics in the ensemble of serially connected spin-torque oscillators governed by the Landau-Lifshitz-Gilbert-Slonczewski magnetization equation. Proximity to homoclinicity hampers synchronization of spin-torque oscillators: when the synchronous ensemble experiences the homoclinic bifurcation, the growth rate per oscillation of small deviations from the ensemble mean diverges. Depending on the configuration of the contour, sufficiently strong common noise, exemplified by stochastic oscillations of the current through the circuit, may suppress precession of the magnetic field for all oscillators. We derive the explicit expression for the threshold amplitude of noise, enabling this suppression.
KW  - Statistical and Nonlinear Physics
Y1  - 2019
U6  - https://doi.org/10.1140/epjb/e2019-100152-2
SN  - 1434-6028
SN  - 1434-6036
VL  - 92
IS  - 7
PB  - Springer
CY  - New York
ER  -