| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Unraveling Optically Induced Ultrafast Modification of Nanoscale Magnetic Textures |
| Author(s) |
Roopali Kukreja, Rahul Jangid |
| On-Site Speaker (Planned) |
Rahul Jangid |
| Abstract Scope |
Ultrafast control of magnetization has emerged as a new paradigm for the next generation memory and data storage devices. However, it has been recently recognized that nanoscale heterogeneities can play a critical role in dictating the ultrafast behavior. I will discuss our recent experimental results at x-ray free electron laser (XFEL) sources where we uncovered magnetic texture dependent magnetization dynamics at ultrafast timescales. Our results shows that the symmetry of magnetic texture dictates the magnitude and timescale of the ultrafast response. We also observed fluence threshold dependence for distortions of diffraction pattern which are not seen for magnetization quenching, consistent with a picture of domain wall motion with pinning sites. Supported by simulations, we show that a speed of ~66 km/s for highly curved domain walls can explain the experimental data. We show that far from equilibrium behavior can be used to manipulate spin degrees of freedom at mesoscopic lengthscales. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Thin Films and Interfaces, Characterization |