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Enhancing Field-Like Efficiency Via Interface Engineering with Sub-Atomic Layer Ta Insertion
The prevailing research emphasis has been on reducing the critical switching current density (J ) by enhancing the damping-like efficiency (β ). However, recent studies have shown that the field-like efficiency (β ) can also play a major role in reducing J . In this study, the central inversion asym...
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Published in: | Advanced science 2024-12, p.e2412409 |
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Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | The prevailing research emphasis has been on reducing the critical switching current density (J
) by enhancing the damping-like efficiency (β
). However, recent studies have shown that the field-like efficiency (β
) can also play a major role in reducing J
. In this study, the central inversion asymmetry of Pt-Co is significantly enhanced through interface engineering at the sub-atomic layer of Ta, thereby inducing substantial alterations in the β
associated with the interface. The β
has shown a 123% increase, from -1.66 Oe/(MA cm
) to -3.8 Oe/(MA cm
). As a result, the multilayered Ta/Pt/Ta (0.3 nm insertion)/Co/Ta structure leads to a notable decrease in J
, exceeding a remarkable 90% compared to the simpler Ta/Pt/Co/Ta structure, ultimately achieving a significantly low value of 2.7 MA cm
. These findings pave the way for the development of highly efficient and energy-saving spin-orbit torque (SOT)-based spintronic devices, where further optimizations in interface engineering can unlock even greater potential in terms of reduced power consumption and enhanced performance. |
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ISSN: | 2198-3844 2198-3844 |
DOI: | 10.1002/advs.202412409 |