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Published on: November 21, 2019
Nanosecond X-Ray Photon Correlation Spectroscopy on Magnetic Skyrmions
M H Seaberg1, B Holladay2, J C T Lee3,4
1Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94720, USA.
We developed a new X-ray photon correlation spectroscopy method to study magnetic material fluctuations. This technique reveals differences in fluctuation times between magnetic phases, opening new research avenues.
Area of Science:
- Condensed matter physics
- Materials science
- X-ray science
Background:
- Understanding spontaneous fluctuations is crucial for condensed matter physics.
- Previous methods were limited in studying rapid, nanoscale fluctuations.
Purpose of the Study:
- To develop and demonstrate a novel X-ray photon correlation spectroscopy (XPCS) method.
- To investigate nanoscale, nanosecond-timescale fluctuations in magnetic thin films.
Main Methods:
- Utilized the two-pulse mode at the Linac Coherent Light Source (LCLS).
- Employed coherent resonant X-ray magnetic scattering.
- Studied spontaneous fluctuations in multilayered Fe/Gd thin films.
Main Results:
- Observed distinct correlation times for fluctuations in Skyrmion lattice and stripe phases.
- Identified differences in fluctuation dynamics near the stripe-Skyrmion phase boundary.
Conclusions:
- The new XPCS method enables the study of equilibrium fluctuations on nanosecond timescales.
- This technique opens a new frontier for investigating dynamic processes in magnetic materials.
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