About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Using Soft X-ray Photon Correlation Spectroscopy to Study Magnetic Helical Dynamics |
Author(s) |
Sophie Ann Morley, Arnab Singh, Emily Hollingworth, Ryan Tumbleson, Peter J. Fischer, Frances Hellman, Stephen D. Kevan, Sujoy Roy |
On-Site Speaker (Planned) |
Sophie Ann Morley |
Abstract Scope |
Anti-symmetric exchange, or the Dzyaloshinskii–Moriya interaction (DMI), is responsible for non-collinear spin textures such as canting, helices and skyrmions. Using resonant soft x-ray scattering, we characterize the dynamics around the thermodynamic transition from a helical to paramagnetic phase in a magnetic thin film. We employ x-ray photon correlation spectroscopy (XPCS) to record the time-dependent speckle patterns and extract the characteristic relaxation time as a function of temperature, over three orders of magnitude. Synchrotron soft x-rays are also element-specific when tuned to a resonant edge allowing the exploration of the contribution of different atomic species to the dynamic behavior, not possible with many other microscopy or bulk measurement techniques. We show how the recorded speckle patterns give simultaneous length and time-scale measurements of the magnetic dynamic behavior. We also performed micromagnetic simulation to model the complex twisted 3D spin structure and reproduce the experimental behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Thin Films and Interfaces, Phase Transformations |