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Incoherent Nuclear Resonant Scattering from a Standing Spin Wave
Jakob Gollwitzer1, Lars Bocklage2,3, Kai Schlage2
1Institute for Applied Physics, Universität Hamburg, Jungiusstrasse 11, 20355, Hamburg, Germany. jakob.gollwitzer@desy.de.
Scientific Reports
|July 28, 2018
Summary
We developed a new method using Nuclear Resonant Scattering to study spin waves in magnetic materials. This technique allows detailed mapping of dynamic spin configurations in microstructures.
Area of Science:
- Condensed matter physics
- Materials science
- Magnetism
Background:
- Understanding dynamic spin configurations in microstructured magnetic systems is crucial for developing advanced magnetic devices.
- Existing methods may lack the spatial resolution to probe non-homogeneous spin dynamics.
Purpose of the Study:
- To introduce and validate a novel experimental method for studying the spatial profiles of standing spin waves.
- To enable the investigation of non-uniform dynamic spin configurations in ferromagnetic microstructures.
Main Methods:
- Utilized Nuclear Resonant Scattering (NRS) of 57Fe with a microfocused synchrotron radiation beam.
- Employed a beam with a transverse coherence length smaller than the lateral variation scale of magnetization dynamics.
- Applied an incoherent superposition model to determine the NRS signal from confined spin waves.
Main Results:
- Successfully reconstructed the precessional amplitude profile of a confined spin wave across a stripe.
- Demonstrated the capability to map spatial variations in magnetization dynamics.
- Validated the analytical model predictions through experimental data.
Conclusions:
- The developed NRS method provides a powerful tool for probing dynamic spin configurations in microstructured magnetic systems.
- This technique opens new avenues for research into spin wave phenomena at the microscale.
- Facilitates a deeper understanding of non-homogeneous spin dynamics relevant to spintronics.
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