论文标题
依赖温度的自旋传输和超导体/铁磁异质结构中的电流诱导的扭矩
Temperature-dependent spin-transport and current-induced torques in superconductor/ferromagnet heterostructures
论文作者
论文摘要
我们通过从相邻的FM层的旋转泵送到超导体中的注入到超导体中。$ \; $; $ to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to pt spin sint层，并在pt旋转式的繁殖力中置于pt旋转层，并在倍数上驱动pt sine coernance premagnance preements-heperstruct。 （CPW）。微波传输信号的相灵敏感检测用于定量提取样品和CPW之间的电感耦合强度，并用反电流诱导的扭矩在我们的异质结构中解释为温度的函数。在超导过渡温度$ t _ {\ mathrm {c}} $下方，我们观察到通过反向自旋霍尔效应（ISHE）在PT层中产生的类似阻尼的扭矩（ISHE）抑制，这可以通过超导向NBN层中的SuperDoctuctuctuctuctuctuction nbn layer中的旋转电流转运的变化来理解。此外，我们在$ t _ {\ mathrm {c}} $下方找到一个类似磁场的电流诱导的扭矩。
We investigate the injection of quasiparticle spin currents into a superconductor via spin pumping from an adjacent FM layer.$\;$To this end, we use NbN/\ch{Ni80Fe20}(Py)-heterostructures with a Pt spin sink layer and excite ferromagnetic resonance in the Py-layer by placing the samples onto a coplanar waveguide (CPW). A phase sensitive detection of the microwave transmission signal is used to quantitatively extract the inductive coupling strength between sample and CPW, interpreted in terms of inverse current-induced torques, in our heterostructures as a function of temperature. Below the superconducting transition temperature $T_{\mathrm{c}}$, we observe a suppression of the damping-like torque generated in the Pt layer by the inverse spin Hall effect (iSHE), which can be understood by the changes in spin current transport in the superconducting NbN-layer. Moreover, below $T_{\mathrm{c}}$ we find a large field-like current-induced torque.
