Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.40: Poster
Tuesday, September 6, 2022, 17:30–20:00, P2
Vertical Pt|Y3Fe5O12|Pt heterostructures for magnon mediated magnetoresistance measurements — •Philipp Schwenke1,2, Manuel Müller1,2, Andreas Haslberger1,2, Stephan Geprägs1, and Rudolf Gross1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, Technische Universität München, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), 80799 München, Germany
Spin currents and their generation (detection) via the (inverse) spin Hall effect in heavy metal (HM)|ferrimagnetic insulator (FMI) heterostructures gain increasing attention in the field of spintronics. In particular, spin current valves in HM|FMI|HM trilayers such as Pt|YIG|Pt heterostructures are of great interest to enable device miniaturization and the implementation of three-dimensional spintronic devices. In this work we optimize the fabrication of these vertical Pt|YIG|Pt heterostructures. We study the interface quality between Pt an YIG by performing angle dependent magnetoresistance measurements on the Pt layers. We observe a good top YIG|Pt interface quality and find an improvement of the bottom Pt|YIG interface by introducing a Ru buffer layer, which reduces the intermixing of Pt and YIG. Furthermore, we observe a finite magnon mediated magnetoresistance and spin Seebeck effect signal in our heterostructures demonstrating the possibility of HM|FMI trilayers as spin current valve devices.