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Interfacial properties of [Pt/Co/Pt] trilayers probed through magnetometry.
Young Chan Won1, Sang Ho Lim2,3
1Department of Nano Semiconductor Engineering, Korea University, Seoul, 02841, South Korea.
Scientific Reports
|May 25, 2021
Summary
Investigating [Pt/Co/Pt] magnetic multilayers revealed that the top platinum layer significantly alters cobalt layer properties. Magnetometry can effectively assess the interface quality in such magnetic systems.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Multilayer magnetic systems, such as platinum/cobalt/platinum [Pt/Co/Pt], are crucial in various spintronic applications.
- Understanding interface effects is key to optimizing magnetic properties in thin films.
Purpose of the Study:
- To investigate the magnetic and interface properties of [Pt/Co/Pt] multilayer systems.
- To determine how the top platinum layer influences the magnetic characteristics of the cobalt layer.
Main Methods:
- Magnetic dead layer plots were employed to analyze magnetic properties.
- The cobalt layer was modeled as two distinct regions with differing magnetic behaviors.
Main Results:
- The cobalt layer region near the top interface exhibited reduced magnetization and nonlinear behavior.
- The cobalt layer region away from the interface showed magnetization closer to bulk values and linear behavior.
- Nonlinear magnetic behavior in the low cobalt thickness range was attributed to impurity effects.
Conclusions:
- The top platinum layer exerts a significant influence on the magnetic properties of the cobalt layer.
- Magnetometry serves as a valuable tool for evaluating the interface quality of magnetic multilayer systems.
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