Regensburg 2019 – wissenschaftliches Programm
MA 12.5: Vortrag
Montag, 1. April 2019, 18:15–18:30, H53
Impact of magnetic moment and anisotropy of Co1−xFex thin films on the magnetic proximity effect of Pt — Panagiota Bougiatioti1, Orestis Manos1, Olga Kuschel2, Joachim Wollschläger2, Martin Tolkiehn3, Sonia Francoual3, and •Timo Kuschel1 — 1Center for Spinelectronic Materials and Devices, Bielefeld University, Germany — 2Center of Physics and Chemistry of New Materials, Osnabrück University, Germany — 3Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
We have investigated the magnetic proximity effect in Pt depending on the magnetic moment and anisotropy of adjacent metallic ferromagnetic films by x-ray resonant magnetic reflectivity at the Pt absorption edge (11565 eV) . For Pt on different ferromagnetic metals such as Ni1−xFex  and Co1−xFex , we observe a linear dependence between the Pt magnetic moment and the moment of the adjacent ferromagnet. The largest Pt magnetic moment of (0.72±0.03) µB per spin polarized Pt atom has been detected in Pt/Co0.33Fe0.67 . In addition, the Pt magnetic moment clearly follows the magnetic anisotropy of the ferromagnet below. This has been studied for Pt on Fe(001) and on Co0.5Fe0.5(001) with 45∘ rotated fourfold magnetocrystalline anisotropy as checked by magnetooptic Kerr effect . In future work, the interplay of spin caloritronic and thermoelectric effects in these all-metallic bilayers will be explored.
 T. Kuschel et al., Phys. Rev. Lett. 115, 097401 (2015)
 C. Klewe et al., Phys. Rev. B 93, 214440 (2016)
 P. Bougiatioti et al., arXiv:1807.09032