Microwave magnetic properties of twisting structure in artificial ferrimagnet Py/Gd multilayers

•The microwave magnetic properties were studied in twisting structure of artificial ferrimagnet Py/Gd multilayers via FMR measurement.•The increscent magnetic twisting extent due to the enhancement of antiferromagnetic coupling between Py and Gd.•The inverse relationship between 4πMeff and αeff with an increasing Gd thickness is attributed to the spin pumping effect at the interface.