Spin-current dissipation in a thin-film bilayer ferromagnet/antiferromagnet
D.M. Polishchuk1,2, T.I. Polek1, V.Yu. Borynskyi1, A.F. Kravets1, A.I. Tovstolytkin1, A.M. Pogorily1, and V. Korenivski2
1Institute of Magnetism
NAS of Ukraine and MES of Ukraine, Kyiv 03142, Ukraine
2Nanostructure Physics, Royal Institute of Technology, Stockholm 10691, Sweden pos Анотація:
Received March 5, 2020, published online June 22, 2020
Ferromagnetic resonance in multilayer metal nanostructures containing an antiferromagnetic layer with various thicknesses has been studied. The contribution to the line width of the ferromagnetic resonance due to the dissipation of the pumped spin current in the exchange-coupled bilayer antiferromagnet/ferromagnet is highlighted. The dissipative processes occurring in the bulk of the antiferromagnet and at the interface between antiferromagnet (Fe50Mn50) and ferromagnet (permalloy, Ni81Fe19) are separated. The features of the transformation of dissipation processes upon deviation of the Neel vector of an antiferromagnet from the direction of exchange biased field are determined. The proposed method is effective for studying spin scattering processes in individual layers and at interlayer interfaces in complex magnetic systems.
Key words: ferromagnetic resonance, multilayer metal nanostructures, pumped spin current.