  Spin-orbit-torque-driven dynamics have recently gained interest in the field
of magnetism due to the reduced requirement of current densities and an
increase in efficiency, as well as the ease of implementation of different
devices and materials. From a practical point of view, the low-frequency
dynamics below 1 GHz is particularly interesting since dynamics associated with
magnetic domains lie in this frequency range. While spin-torque excitation of
high-frequency modes has been extensively studied, the intermediate
low-frequency dynamics have received less attention, although spin torques
could potentially be used for both manipulation of the spin texture, as well as
the excitation of dynamics. In this work, we demonstrate that it is possible to
drive magnetic vortex dynamics in a single microdisk by spin-Hall torque at
varying temperatures, and relate the results to transport properties. We find
that the gyrotropic mode of the core couples to the low-frequency microwave
signal and produces a measurable voltage. The dynamic measurements are in
agreement with magnetic transport measurements and are supported by
micromagnetic simulations. Our results open the door for integrating magnetic
vortex devices in spintronic applications.
