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MA: Fachverband Magnetismus

MA 36: Spin transport

MA 36.6: Vortrag

Mittwoch, 3. April 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)