Who: Inge Groen, Nanodevices Group, nanoGUNE
Place: Online webinar & CFM Auditorium
Date: Wednesday, 9 March 2022, 10:30
Optimization of spin-orbit magnetic-state readout in metallic nanodevices
Nanodevices Group, CIC nanoGUNE
This thesis presents the first steps for optimization of the magnetic-state readout component for the envisioned magnetoelectric spin-orbit (MESO)-logic device. We established that reducing the device dimension of ferromagnetic/spin-orbit metal nanostructured devices leads to enhancement of output current and voltage. We showed that spurious effects in the device due to the local configuration can be avoided by properly designing the ferromagnetic and spin-orbit metal electrodes. Lastly, we demonstrate that the interface properties and interfacial spin-charge interconversion have to be carefully considered when studying spin transport in metallic devices. Additionally, such interface can display large spin-charge interconversion and might be applicable to the MESO-logic devices. The required output signals for the cascaded gates allowing logic operations with the MESO devices are not achieved yet. However, a deeper understanding of the local spin Hall device is obtained resulting in a guideline for further improvement of the output signals including downscaling of the device dimensions, implementation of other materials system with large SCI efficiency and high resistivities, and adjusting the design by introducing a highly resistive interface. Further experiments are required to demonstrate the use of our device as a driving force for spin-logic circuits, but we anticipate that a MESO-logic device is a feasible solution for more energy efficient computing.
Supervisor: Fèlix Casanova and Luis E. Hueso
Please access to the following link for ONLINE - Ph.D. Thesis Defense: Optimization of spin-orbit magnetic-state readout in metallic nanodevices on Mar 9, 2022 10:30 AM CEST: