Magneto-Optical Imaging of Magnetic Domain Structures
Summary
Magneto-optical imaging harnesses the interaction between polarised light and magnetised media to visualise the arrangement and dynamics of magnetic domains. Central to this approach are effects such as the Kerr and Faraday rotations, whereby the plane of polarisation is rotated in proportion to the local magnetisation. Wide-field microscopy permits rapid mapping of domain patterns over millimetre scales, while advanced techniques achieve spatial resolution down to tens of nanometres and temporal resolution into the picosecond regime. These capabilities have underpinned progress in fundamental studies of domain nucleation, wall motion and spin-wave propagation, as well as in applied fields including spintronics, magnetic data storage and sensor development. Recent enhancements encompass polarisation-free contrast mechanisms, multiplexed detection of vector magnetisation components and integration with cryogenic and high-field environments, broadening the technique’s reach across materials science and device physics.
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Magneto-Optical Imaging of Magnetic Domain Structures publication trend
The graph below shows the total number of articles in magneto-optical imaging of magnetic domain structures across all publications each year (not limited to Nature Index journals).
Technical terms
Magneto-optical Kerr effect (MOKE): Rotation or ellipticity change of reflected light induced by surface magnetisation.
Faraday effect: Rotation of polarisation of transmitted light proportional to bulk magnetisation.
Magnetic domain: Region within a ferromagnetic material where magnetisation is uniformly aligned.
Domain wall: Narrow boundary separating adjacent magnetic domains of differing orientation.
Spintronics: Field exploiting electron spin and associated magnetic moments for information processing.
References
- Characterization of Magnetic Thin Films and Spintronic Devices Using Magneto-optic Kerr Microscopy. Advanced Devices & Instrumentation (2024).
- Analyzer-free, intensity-based, wide-field magneto-optical microscopy. Applied Physics Reviews (2021).
- Advanced magneto-optical microscopy: Imaging from picoseconds to centimeters - imaging spin waves and temperature distributions (invited). AIP Advances (2016).
- Progress in magnetic domain observation by advanced magneto-optical microscopy. Journal of Physics D (2015).
- Three-dimensional frequency- and phase-multiplexed magneto-optical microscopy.. Optics Express (2019).
- Domain Imaging in Periodic Submicron Wide Nanostructures by Digital Drift Correction in Kerr Microscopy. Advanced Photonics Research (2023).
- Direct imaging of nanoscale field-driven domain wall oscillations in Landau structures. Nanoscale (2022).
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