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Nuclear resonance reflectivity from a [57Fe/Cr]30 multilayer with the Synchrotron Mössbauer Source
Marina A Andreeva1, Roman A Baulin1, Aleksandr I Chumakov2
1Faculty of Physics, M. V. Lomonosov Moscow State University, Moscow 119991, Russian Federation.
Journal of Synchrotron Radiation
|March 1, 2018
Summary
Researchers studied magnetic multilayer films using Mössbauer reflectivity and nuclear resonance reflectivity. They observed changes in magnetic alignment within the [57Fe/Cr]30 multilayer under an external field.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Multilayer structures with magnetic properties are crucial for advanced electronic devices.
- Understanding magnetic coupling and alignment in thin films is essential for developing new technologies.
- Antiferromagnetic coupling in [57Fe/Cr] multilayers presents unique magnetic behaviors.
Purpose of the Study:
- To investigate the magnetic alignment transformation in a [57Fe/Cr]30 multilayer.
- To analyze specific features in Mössbauer reflectivity spectra and nuclear resonance reflectivity (NRR) curves.
- To utilize Synchrotron Mössbauer Source (SMS) for detailed magnetic characterization.
Main Methods:
- Measurement of Mössbauer reflectivity spectra and NRR curves using Synchrotron Mössbauer Source (SMS).
- Analysis of spectra near the critical angle and at the magnetic maximum.
- Application of external magnetic fields to observe magnetic alignment changes.
Main Results:
- Observed specific features in Mössbauer reflectivity spectra with π-polarized radiation.
- Analyzed the variation of spectral line ratios and the intensity of the magnetic maximum.
- Successfully revealed the transformation of magnetic alignment under an applied external field.
Conclusions:
- The study demonstrates the effectiveness of Mössbauer reflectivity and NRR for probing magnetic structures.
- The [57Fe/Cr]30 multilayer exhibits a field-induced transformation in magnetic alignment.
- This research provides insights into the magnetic behavior of antiferromagnetically coupled multilayers.
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