Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure

Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure

In this work, we show that domain wall (DW) dynamics within a system provide an alternative platform to characterizing spin-orbit torque (SOT) effective fields. In perpendicularly magnetized wires with a Pt/(Co/Ni)4/Co/IrMn stack structure, differential Kerr imaging shows that the magnetization swit...

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Main Authors: Engel, Christian, Goolaup, Sarjoosing, Luo, Feilong, Gan, Weiliang, Lew, Wen Siang
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2017
Subjects:
Magnetic fields
Magnetic anisotropy
Online Access:https://hdl.handle.net/10356/83464
http://hdl.handle.net/10220/42578
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-834642023-02-28T19:27:48Z Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure Engel, Christian Goolaup, Sarjoosing Luo, Feilong Gan, Weiliang Lew, Wen Siang School of Physical and Mathematical Sciences Magnetic fields Magnetic anisotropy In this work, we show that domain wall (DW) dynamics within a system provide an alternative platform to characterizing spin-orbit torque (SOT) effective fields. In perpendicularly magnetized wires with a Pt/(Co/Ni)4/Co/IrMn stack structure, differential Kerr imaging shows that the magnetization switching process is via the nucleation of the embryo state followed by domain wall propagation. By probing the current induced DW motion in the presence of in-plane field, the SOT effective fields are obtained using the harmonic Hall voltage scheme. The effective anisotropy field of the structure decreases by 12% due to the SOT effective fields, as the in-plane current in the wire is increased. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2017-06-05T09:00:50Z 2019-12-06T15:23:34Z 2017-06-05T09:00:50Z 2019-12-06T15:23:34Z 2017 Journal Article Engel, C., Goolaup, S., Luo, F., Gan, W., & Lew, W. S. (2017). Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure. Journal of Applied Physics, 121(14), 143902-. 0021-8979 https://hdl.handle.net/10356/83464 http://hdl.handle.net/10220/42578 10.1063/1.4980108 en Journal of Applied Physics © 2017 American Institute of Physics (AIP). This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics (AIP). The published version is available at: [http://dx.doi.org/10.1063/1.4980108]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 7 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Magnetic fields
Magnetic anisotropy
spellingShingle Magnetic fields
Magnetic anisotropy
Engel, Christian
Goolaup, Sarjoosing
Luo, Feilong
Gan, Weiliang
Lew, Wen Siang
Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure
description In this work, we show that domain wall (DW) dynamics within a system provide an alternative platform to characterizing spin-orbit torque (SOT) effective fields. In perpendicularly magnetized wires with a Pt/(Co/Ni)4/Co/IrMn stack structure, differential Kerr imaging shows that the magnetization switching process is via the nucleation of the embryo state followed by domain wall propagation. By probing the current induced DW motion in the presence of in-plane field, the SOT effective fields are obtained using the harmonic Hall voltage scheme. The effective anisotropy field of the structure decreases by 12% due to the SOT effective fields, as the in-plane current in the wire is increased.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Engel, Christian
Goolaup, Sarjoosing
Luo, Feilong
Gan, Weiliang
Lew, Wen Siang
format Article
author Engel, Christian
Goolaup, Sarjoosing
Luo, Feilong
Gan, Weiliang
Lew, Wen Siang
author_sort Engel, Christian
title Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure
title_short Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure
title_full Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure
title_fullStr Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure
title_full_unstemmed Spin-orbit torque induced magnetization anisotropy modulation in Pt/(Co/Ni)4/Co/IrMn heterostructure
title_sort spin-orbit torque induced magnetization anisotropy modulation in pt/(co/ni)4/co/irmn heterostructure
publishDate 2017
url https://hdl.handle.net/10356/83464
http://hdl.handle.net/10220/42578
_version_ 1759857015779229696

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