Bendra, M., Fiorentini, S., Goes, W., Selberherr, S., & Sverdlov, V. (2022). The influence of interface effects on the switching behavior in ultra-scaled MRAM cells. Solid-State Electronics, 201, Article 108590. https://doi.org/10.1016/j.sse.2023.108590
E360 - Institut für Mikroelektronik E360-01 - Forschungsbereich Mikroelektronik
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Journal:
Solid-State Electronics
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ISSN:
0038-1101
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Date (published):
Mar-2022
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Number of Pages:
7
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Publisher:
PERGAMON-ELSEVIER SCIENCE LTD
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Peer reviewed:
Yes
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Keywords:
Spin-Transfer Torques; Ultra-Scaled MRAM; Interfacial-Perpendicular Magnetic Anisotropy
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Abstract:
The development of advanced magnetic tunnel junctions with a single-digit nanometer footprint can be achieved using an elongated multilayered ferromagnetic free layer structure. In this work, we demonstrate the switching of a composite free layer consisting of two ferromagnets separated by an MgO layer and an additional capping MgO layer to boost perpendicular anisotropy. This serially connected MTJs form a multi-state memory cell. Because of the ability to store data in more than one bit (0 or 1), the memory density can be increased, making the memory more efficient and cost-effective. A proper design of the free layer and its interface-induced perpendicular anisotropy helps to achieve reliable switching.
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Project title:
CD-Labor für Nichtflüchtige magnetisch-resistive Speicher und Logik: P300686 (Christian Doppler Forschungsgesells)
