Lateral spin pumping in embedded magnetic nanostructures based on Fe60Al40 alloy

We report on ferromagnetic resonance (FMR) detected spin pumping in Fe60Al40 /Pd and Py/Fe60Al40 bilayers, and laterally patterned Fe60Al40 (FeAl) nanostructures. The magnetic properties of FeAl alloy are tailorable from paramagnetic to ferromagnetic state by variation of the structure through an ion beam irradiation, which makes this material promising for the fabrication of magnetic landscapes and magnonic crystals. Exploiting this tunability, we show that FeAl can be used as spin source and spin sink in spin pumping experiments. Using the material with the identical chemical composition as para- and ferromagnet, we suggest a new pathway for creating lateral spin pumping geometries which are produced with ion beam irradiation of B2 alloys.