Magnetic anisotropy in the exchange-biased laser-patterned thin Co/CoO films
M Perzanowski1, O Polit1, J Chojenka1
1Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
Nanotechnology
|September 6, 2022
Summary
Laser patterning of magnetic multilayers modifies their properties, softening edges while preserving the exchange bias effect at centers. This research explores shape and configurational anisotropies in patterned magnetic materials for spintronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Exchange bias effect is crucial for magnetic sensors and spintronic devices.
- Controlling magnetic properties through nanoscale patterning is key for advanced applications.
Purpose of the Study:
- To investigate the impact of laser interference patterning on Pd/CoO/Co/Pd multilayers.
- To analyze the resulting magnetic softening and preserved exchange bias.
- To understand shape and configurational anisotropies induced by patterning.
Main Methods:
- Fabrication of Pd/CoO/Co/Pd multilayers.
- Laser interference patterning to create geometric arrays (stripes, rectangles, squares).
- Magnetic property measurements under varying external magnetic field angles.
Main Results:
- Laser patterning induced magnetic softening at the edges of nanostructures.
- The centers of the patterned objects retained the exchange bias effect.
- Magnetic properties showed dependence on the angle of the applied magnetic field relative to the pattern geometry.
Conclusions:
- Laser patterning offers a method to tune magnetic properties of multilayers.
- Pattern geometry and field orientation significantly influence magnetic anisotropy.
- These findings are relevant for designing next-generation spintronic devices.
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