Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures

Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures

We demonstrate the modulation of spin-orbit torque (SOT) fields in synthetic antiferromagnetic (SAF) structures sandwiched between two heavy metals of opposite spin Hall angles. The SOTs fields that are measured by using harmonic Hall voltage technique, increase with net areal magnetization of the P...

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Main Authors: Krishnia, Sachin, Murapaka, Chandrasekhar, Sethi, Pankaj, Gan, Weiliang, Wong, Qi Ying, Lim, Gerard Joseph, Lew, Wen Siang
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2021
Subjects:
Science::Physics
Antiferromagnetism
Magnetization
Online Access:https://hdl.handle.net/10356/151091
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1510912021-06-22T01:52:17Z Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures Krishnia, Sachin Murapaka, Chandrasekhar Sethi, Pankaj Gan, Weiliang Wong, Qi Ying Lim, Gerard Joseph Lew, Wen Siang School of Physical and Mathematical Sciences Science::Physics Antiferromagnetism Magnetization We demonstrate the modulation of spin-orbit torque (SOT) fields in synthetic antiferromagnetic (SAF) structures sandwiched between two heavy metals of opposite spin Hall angles. The SOTs fields that are measured by using harmonic Hall voltage technique, increase with net areal magnetization of the Pt/SAF/Ta structures. The result suggests an antiparallel orientation of the SOT fields in the two ferromagnetic layers. The antiparallel alignment of the SOT fields switches the magnetization of SAF structures with a current density as low as 2.3 × 1011 A/m2. Agency for Science, Technology and Research (A*STAR) National Research Foundation (NRF) This work was supported by the Singapore National Research Foundation, Prime Minister’s Office under a Competitive Research Programme (Non-volatile Magnetic Logic and Memory Integrated Circuit Devices, NRF-CRP9-2011-01), and an Industry-IHL Partnership Program (NRF2015- IIP001-001). The support from an RIE2020 AME-Programmatic Grant (No. A1687b0033) is also acknowledged. WSL is also a member of the Singapore Spintronics Consortium (SG-SPIN). 2021-06-22T01:52:17Z 2021-06-22T01:52:17Z 2018 Journal Article Krishnia, S., Murapaka, C., Sethi, P., Gan, W., Wong, Q. Y., Lim, G. J. & Lew, W. S. (2018). Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures. Journal of Magnetism and Magnetic Materials, 475, 327-333. https://dx.doi.org/10.1016/j.jmmm.2018.11.074 0304-8853 https://hdl.handle.net/10356/151091 10.1016/j.jmmm.2018.11.074 2-s2.0-85057565583 475 327 333 en NRF-CRP9-2011-01 NRF2015- IIP001-001 No. A1687b0033 Journal of Magnetism and Magnetic Materials © 2018 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Antiferromagnetism
Magnetization
spellingShingle Science::Physics
Antiferromagnetism
Magnetization
Krishnia, Sachin
Murapaka, Chandrasekhar
Sethi, Pankaj
Gan, Weiliang
Wong, Qi Ying
Lim, Gerard Joseph
Lew, Wen Siang
Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
description We demonstrate the modulation of spin-orbit torque (SOT) fields in synthetic antiferromagnetic (SAF) structures sandwiched between two heavy metals of opposite spin Hall angles. The SOTs fields that are measured by using harmonic Hall voltage technique, increase with net areal magnetization of the Pt/SAF/Ta structures. The result suggests an antiparallel orientation of the SOT fields in the two ferromagnetic layers. The antiparallel alignment of the SOT fields switches the magnetization of SAF structures with a current density as low as 2.3 × 1011 A/m2.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Krishnia, Sachin
Murapaka, Chandrasekhar
Sethi, Pankaj
Gan, Weiliang
Wong, Qi Ying
Lim, Gerard Joseph
Lew, Wen Siang
format Article
author Krishnia, Sachin
Murapaka, Chandrasekhar
Sethi, Pankaj
Gan, Weiliang
Wong, Qi Ying
Lim, Gerard Joseph
Lew, Wen Siang
author_sort Krishnia, Sachin
title Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
title_short Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
title_full Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
title_fullStr Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
title_full_unstemmed Current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
title_sort current-induced spin-orbit effective field modulations in synthetic antiferromagnetic structures
publishDate 2021
url https://hdl.handle.net/10356/151091
_version_ 1703971224784207872

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