New Materials and Interface Effects In Charge and Spin Transport In Magnetic Heterostructures
A presentation by Professor Guenter Reiss, Ph.D., Bielefeld University, Bielefeld Germany, on magnetic heterostructures which are key devices for spin electronics.
An introduction will present examples of basic effects and their applications. We then will discuss several novel materials and interface-induced effects occurring in magnetic heterostructures: The growth of altermagnetic thin films and their integration in magnetic tunnel junctions with barriers such as RuO<sub>2</sub> are at present intensively investigated due to their potentially spin-split band structure and related spin currents. X-ray analysis reveals a high crystalline quality of the films with or without twinning depending on the choice of the substrate. When integrated with an MgO tunnel barrier and a ferromagnetic counter-electrode, signatures of a tunneling magnetoresistance strongly depend on the bias voltage and are not yet fully understood. When integrated with ferromagnets (Ni<sub>80</sub>Fe<sub>20</sub>) or heavy metals (Pt), an analysis based on the 2ω method shows the presence of torques in accordance with a spin current at the interface. When replacing the altermagnet by a ferromagnet, the heavy metal can show a proximity-induced ferromagnetism at the interface, which substantially influences the results of well-known phenomena such as the spin Seebeck, anomalous Nernst, or anomalous Hall effects. Examples will be discussed using metallic as well as insulating ferro- or ferrimagnets and recipes for disentangling the many effects will be given.
Date and Time
Location
Hosts
Registration
- Date: 19 Jun 2025
- Time: 01:30 AM UTC to 03:00 AM UTC
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- 1120 Ringwood Ct
- San Jose, California
- United States 95131
- Click here for Map
- Starts 14 April 2025 03:00 PM UTC
- Ends 19 June 2025 01:30 AM UTC
- No Admission Charge
Speakers
Magnetic Heterostructures
Guenter Reiss received the Diploma in Physics in 1984 and the Ph.D. in Physics in 1989 at the University of Regensburg and is currently a full professor at Bielefeld University. His main research directions are new materials and devices for spin electronics and applications in memory and sensing systems.
Agenda
| 6:30 - 7:00 | Socializing and Networking at Quadrant |
| 6:55 | Zoom session will be online with Waiting Room |
| 7:00 - 7:45 | Lecture begins, online and in person |
| 7:45 - 8:00 | Questions and Answers |