Regensburg 2019 – scientific programme
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MA: Fachverband Magnetismus
MA 36: Spin transport
MA 36.6: Talk
Wednesday, April 3, 2019, 16:15–16:30, H53
Atomic Layer Deposition of spin Hall active platinum thin films — •Michaela Lammel2, Richard Schlitz1, Akinwumi A. Amusan2, Stefanie Schlicht3, Tommi Tynell2, Julien Bachmann3, Georg Woltersdorf4, Kornelius Nielsch3, Sebastian T.B. Goennenwein1, and Andy Thomas3 — 1Institut für Festkörper- und Materialphysik, Technische Universität Dresden — 2Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Institute for Metallic Materials — 3Friedrich-Alexander University Erlangen-Nürnberg, Inorganic Chemistry — 4Institute of Physics, Martin Luther University Halle-Wittenberg
Due to its strong spin orbit coupling, platinum (Pt) is often used as a spin injector/detector in spintronics. We used atomic layer deposition (ALD) to fabricate Pt thin films in various thicknesses on Y3Fe5O12(YIG)/Gd3Ga5O12 substrates. Magnetotransport experiments were performed on the YIG/Pt heterostructures in three mutually orthogonal rotation planes, revealing the fingerprint of spin Hall magnetoresistance (SMR). Hereby the SMR ratio in our YIG/Pt bilayers is smaller by approximatley a factor of 20 in comparison to results reported for high-quality sputtered Pt. Clearly, further experiments will be required to optimize the interface quality in such ALD-based heterostructures. Nevertheless, our results show that spin Hall active Pt thin films can be fabricated by ALD. Our results pave the way for establishing conformal coating of non-planar surface geometries with spin Hall active metals via ALD [1].
[1] Schlitz et al., Appl. Phys. Lett. 112, 242403 (2018)