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Advanced Modeling and Simulation of Multilayer Spin-Transfer Torque Magnetoresistive Random Access Memory with
Mario Bendra1,2, Roberto Lacerda de Orio2, Siegfried Selberherr2
1Christian Doppler Laboratory for Nonvolatile Magnetoresistive Memory and Logic at the Institute for Microelectronics, TU Wien, Gußhausstraße 27-29/E360, 1040 Vienna, Austria.
Micromachines
|May 25, 2024
Summary
We studied magnetization dynamics in STT-MRAM devices to solve the back-hopping effect, improving data integrity and device performance through optimized exchange coupling.
Area of Science:
- Spintronics
- Condensed Matter Physics
- Materials Science
Background:
- Miniaturization of STT-MRAM devices exacerbates the back-hopping effect, compromising data integrity.
- Understanding interface exchange coupling is crucial for the stability and switching behavior of multilayer spintronic devices.
Purpose of the Study:
- To investigate magnetization dynamics in STT-MRAM devices using the spin drift-diffusion model.
- To analyze the impact of interface exchange coupling on multilayer spintronic device performance.
- To optimize exchange coupling for enhanced data retention and speed in memory devices.
Main Methods:
- Employing the spin drift-diffusion model to simulate magnetization dynamics.
- Investigating interface exchange coupling in multilayer structures.
- Utilizing integrated charge and spin currents for comprehensive MRAM dynamics analysis.
Main Results:
- The spin drift-diffusion model effectively addresses the back-hopping effect in STT-MRAM.
- Interface exchange coupling significantly influences magnetic stability and domain wall movements.
- Optimized exchange coupling leads to improved device performance, including data retention and write/read speeds.
Conclusions:
- The study provides a comprehensive understanding of MRAM dynamics by integrating charge and spin current effects.
- Strategic optimization of exchange coupling is key to enhancing the performance of multilayer spintronic devices.
- This research advances the development of high-capacity, high-performance memory technologies.
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