Enhancing damping-like efficiency by low-energy mixed ions bombardment
Pursuing enhanced spin-orbit torque (SOT) has become a significant focus for achieving energy-efficient spintronics devices. Researchers have explored different materials, layer engineering, and various post-deposition modification methods to realize higher SOT. Here, we have utilized the bombardmen...
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sg-ntu-dr.10356-1741762024-03-25T15:35:24Z Enhancing damping-like efficiency by low-energy mixed ions bombardment Bhatti, Sabpreet Das, Subhakant Shaik, Abdillah Chan, Jianpeng Kay, Yew Seng Li, Shengyao Piramanayagam, S. N. School of Physical and Mathematical Sciences Physics and Applied Physics Physics Spin orbit torque Ion bombardment Spintronics device Pursuing enhanced spin-orbit torque (SOT) has become a significant focus for achieving energy-efficient spintronics devices. Researchers have explored different materials, layer engineering, and various post-deposition modification methods to realize higher SOT. Here, we have utilized the bombardment of mixed ions (Ar+ and He+ in various ratios) with 0.6 kV bias voltage to enhance the SOT efficiency in a Pt/Co/W stack. The bombardment modifies the physical properties (magnetic, electric, and structural) due to cascade collision, knocking off atoms (from the surface), and ion implantation. The increased percentage of He+ suppresses the drastic behavior of cascade collisions, and hence, the properties are tunable by changing the gas ratio. We exploited this behavior to design a material stack with enhanced SOT efficiency. We fabricated Hall bars to quantify SOT and observed a 4.5× increase in the effective damping-like efficiency. The efficiency and switching current density in the stack could be tuned by the variation of Ar:He ion ratio and the exposure duration. This study offers an easy route to tune the energy efficiency of spin devices, contributing to the advancement of next-generation spintronics. National Research Foundation (NRF) Submitted/Accepted version The authors would like to acknowledge the financial support by the Ministry of Education, Singapore, under its Tier 2 Grant No. MOET2EP50122-0023 and the National Research Foundation (NRF), Singapore, for the CRP21 Grant No. NRFCRP21-2018-0003. 2024-03-19T01:49:37Z 2024-03-19T01:49:37Z 2024 Journal Article Bhatti, S., Das, S., Shaik, A., Chan, J., Kay, Y. S., Li, S. & Piramanayagam, S. N. (2024). Enhancing damping-like efficiency by low-energy mixed ions bombardment. Applied Physics Letters, 124(2), 022407-. https://dx.doi.org/10.1063/5.0178084 0003-6951 https://pubs.aip.org/aip/apl/article-abstract/124/2/022407/2933694 https://hdl.handle.net/10356/174176 10.1063/5.0178084 2-s2.0-85182262800 2 124 022407 en MOET2EP50122-0023 NRFCRP21-2018-0003 Applied Physics Letters © 2023 The Author(s). Published under an exclusive license by AIP Publishing. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at http://doi.org/10.1063/5.0178084. application/pdf |
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Physics Spin orbit torque Ion bombardment Spintronics device Bhatti, Sabpreet Das, Subhakant Shaik, Abdillah Chan, Jianpeng Kay, Yew Seng Li, Shengyao Piramanayagam, S. N. Enhancing damping-like efficiency by low-energy mixed ions bombardment |
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Pursuing enhanced spin-orbit torque (SOT) has become a significant focus for achieving energy-efficient spintronics devices. Researchers have explored different materials, layer engineering, and various post-deposition modification methods to realize higher SOT. Here, we have utilized the bombardment of mixed ions (Ar+ and He+ in various ratios) with 0.6 kV bias voltage to enhance the SOT efficiency in a Pt/Co/W stack. The bombardment modifies the physical properties (magnetic, electric, and structural) due to cascade collision, knocking off atoms (from the surface), and ion implantation. The increased percentage of He+ suppresses the drastic behavior of cascade collisions, and hence, the properties are tunable by changing the gas ratio. We exploited this behavior to design a material stack with enhanced SOT efficiency. We fabricated Hall bars to quantify SOT and observed a 4.5× increase in the effective damping-like efficiency. The efficiency and switching current density in the stack could be tuned by the variation of Ar:He ion ratio and the exposure duration. This study offers an easy route to tune the energy efficiency of spin devices, contributing to the advancement of next-generation spintronics. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Bhatti, Sabpreet Das, Subhakant Shaik, Abdillah Chan, Jianpeng Kay, Yew Seng Li, Shengyao Piramanayagam, S. N. |
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Article |
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Bhatti, Sabpreet Das, Subhakant Shaik, Abdillah Chan, Jianpeng Kay, Yew Seng Li, Shengyao Piramanayagam, S. N. |
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Bhatti, Sabpreet |
title |
Enhancing damping-like efficiency by low-energy mixed ions bombardment |
title_short |
Enhancing damping-like efficiency by low-energy mixed ions bombardment |
title_full |
Enhancing damping-like efficiency by low-energy mixed ions bombardment |
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Enhancing damping-like efficiency by low-energy mixed ions bombardment |
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Enhancing damping-like efficiency by low-energy mixed ions bombardment |
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enhancing damping-like efficiency by low-energy mixed ions bombardment |
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2024 |
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https://pubs.aip.org/aip/apl/article-abstract/124/2/022407/2933694 https://hdl.handle.net/10356/174176 |
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