The TRR 227 kindly invites you to the joint Colloquium of the TRR 227 & FU Physics Department Colloquium, which will be held as online event. Meeting details will be given in due time.

Speaker: Prof. Dr. Pietro Gambardella - Magnetism and Interface Physics, Department of Materials, ETH Zurich, Switzerland

Title: Switching, sensing, and coupling nanomagnets enabled by spin-orbit coupling

Abstract:
The spintronics landscape has changed dramatically over the last ten years. Much of this change is due to a deeper understanding of the charge-spin conversion processes and magnetic interactions mediated by spin-orbit coupling in different classes of materials [1]. In this talk, I will discuss new opportunities to control and manipulate the magnetization of metallic and insulating nanomagnets. Illustrative examples will focus on the electrical switching of magnetic tunnel junctions [2,3] and iron garnets [4], as well as on the emergence of chiral coupling phenomena, which enable the realization of synthetic antiferromagnets and skyrmions [5] as well as of domain wall logic circuits [6].

[1] Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems, A. Manchon et al., Rev. Mod. Phys. 91, 035004 (2019).

[2] Single-shot dynamics of spin-orbit torque and spin transfer torque switching in 3-terminal magnetic tunnel junctions, E. Grimaldi et al., Nat. Nanotech. 15, 111 (2020).

[3] Field-free switching of magnetic tunnel junctions driven by spin–orbit torques at sub-ns timescales, V. Krizakova et al., Appl. Phys. Lett. 116, 232406 (2020).

[4] High-speed domain wall racetracks in a magnetic insulator, S. Velez et al., Nat. Comm. 10, 4750 (2019).

[5] Chirally coupled nanomagnets, Z. Luo et al., Science 363, 1435 (2019).

[6] Current-driven magnetic domain-wall logic, Z. Luo et al., Nature 579, 214 (2020).