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Manipulation of Magnetic Skyrmion Density in Continuous Ir/Co/Pt Multilayers
Micromachines
|November 11, 2022
Summary
Room temperature magnetic skyrmions were stabilized in [Ir/Co/Pt] multilayers without external fields. Skyrmion density can be enhanced, enabling optimized skyrmion-based device engineering.
Area of Science:
- Condensed matter physics
- Materials science
- Nanotechnology
Background:
- Magnetic skyrmions are topologically protected spin textures with potential for data storage and spintronic devices.
- Stabilizing skyrmions at room temperature without external fields is crucial for practical applications.
Purpose of the Study:
- To demonstrate room-temperature stabilization of magnetic skyrmions in [Ir/Co/Pt] multilayers.
- To investigate the influence of cobalt thickness on magnetic domain structure and skyrmion formation.
- To explore methods for enhancing skyrmion density.
Main Methods:
- Fabrication of [Ir/Co/Pt]5 multilayers on SiO2/Si substrates.
- Characterization of magnetic domain patterns using magnetic force microscopy (MFM).
- Application of an in-plane magnetic field procedure to manipulate skyrmion density.
Main Results:
- Magnetic skyrmions were stabilized at room temperature in continuous [Ir/Co/Pt]5 multilayers without requiring electric current or magnetic field.
- A transition from a worm-like magnetic domain state to separated stripes was observed upon decreasing cobalt thickness.
- Skyrmions were clearly imaged in both magnetic states using MFM.
- Skyrmion density was significantly enhanced by applying an in-plane field procedure.
Conclusions:
- Room-temperature stabilization of magnetic skyrmions is achievable in [Ir/Co/Pt] multilayers.
- The study provides a method to manipulate skyrmion density, crucial for the development of skyrmion-based devices.
- These findings pave the way for optimized engineering of future spintronic devices.
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