11:15 AM - 11:30 AM
▲ [14a-A501-9] Efficient spin current injection in Co2MnSi/Pt films
Keywords:Spin current, Heusler alloys
Spin pumping is one of the promising ways to generate the spin current in ferromagnetic (FM)/nonmagnetic (NM) heterostructures. A magnetization precessional motion under the ferromagnetic resonance (FMR) condition induces the spin current flow to the NM layer and it is converted into a transverse charge current via the inverse spin Hall effect(ISHE) in the NM layer. The key factor determining the spin transport property is the spin mixing conductance at the FM/NM surface. The spin injection efficiency depends on the choice of the materials, however, there are few reports on its FM material dependence. In this study, the spin injection efficiency in Co2MnSi(CMS), which shows a large spin polarization and large magnetoresistance, was systematically investigated using the spin pumping method.