Temperature-Dependent Spin Transport and Current-Induced Torques in Superconductor-Ferromagnet Heterostructures

We investigate the injection of quasiparticle spin currents into a superconductor via pumping from an adjacent FM layer.$\;$To this end, we use NbN/\ch{Ni80Fe20}(Py)-heterostructures with Pt sink layer and excite ferromagnetic resonance in Py-layer by placing samples onto coplanar waveguide (CPW). A phase sensitive detection microwave transmission signal is used to quantitatively extract inductive coupling strength between sample CPW, interpreted terms inverse current-induced torques, our heterostructures as function temperature. Below superconducting transition temperature $T_{\mathrm{c}}$, observe suppression damping-like torque generated Hall effect (iSHE), which can be understood changes current transport NbN-layer. Moreover, below $T_{\mathrm{c}}$ find large field-like torque.