  Quantum impurity (QI) spins offer promising information processing and
sensing applications by harnessing up to room-temperature quantum coherence.
Challenged by the requirement of designing local coherent drives and improving
sensitivity to various signals for such applications, the search of hybrid
systems coupling QI spins with matter excitations have garnered significant
recent interest. We propose and theoretically study a hybrid system that
couples spin-1 QI with the dynamical excitations of nanomagnets, which are
controlled by mechanisms uncovered in classical spintronics. We show that in
such systems the QI-spin decoherence, due to coupling to thermally excited
modes of the nanomagnet, can be designed across a wide range by exploiting the
control over nanomagnet's mode ellipticity and the chiral nature of the
coupling between the QI spin and nanomagnet. On the other hand, when activated
electrically via voltage-induced torques, we demonstrate that QI spins can be
driven coherently with large quality factors at room temperature by leveraging
inherent non-linear precessional modes of the nanomagnet. Our results provide
theoretical guidance for enabling unique quantum spintronic functionalities,
such as local coherent driving of QI spins up to ambient conditions, and the
design of nanomagnet-enhanced QI-based hybrid sensors.
