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Temperature controlled switchable exchange bias and coercivity in spin glass/ferromagnet multilayers under tilting
1Department of Physics, College of Sciences, Northeastern University, Shenyang 110819, China. huyong@mail.neu.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|April 25, 2020
Summary
Researchers observed a 100% temperature-controlled switch between exchange bias and coercivity in spintronic devices. This finding enables thermally assisted read/write applications using nanostructure engineering and rotational magnetizing.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Exchange bias and coercivity are critical properties in spintronic devices.
- Understanding their temperature dependence is key for device applications.
Purpose of the Study:
- To investigate temperature-dependent exchange bias and coercivity in ferromagnetic/spin glass heterostructures.
- To explore the potential for temperature-controlled switching in spintronic devices.
Main Methods:
- Utilized a modified Monte Carlo method to simulate three distinct stacking structures.
- Analyzed angular dependence of magnetic field and easy axis interactions.
- Studied thermal remnant magnetization, Zeeman and exchange energies, and magnetic training effects.
Main Results:
- Observed a 100% temperature-controlled switch between exchange bias field and coercivity.
- Identified a minimum non-zero angle for complete switching, dependent on stacking structure.
- Confirmed the crucial role of spin glassy dynamics in achieving a smooth and full switch.
Conclusions:
- Spin glassy dynamics are essential for temperature-controlled switching in these heterostructures.
- Demonstrated potential for designing thermally assisted read/write switchable spintronic devices.
- Highlighted the importance of nanostructure engineering and rotational magnetizing for device applications.
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