We investigate the Dzyaloshinskii–Moriya interaction (DMI) and spin–orbit torque effects in CuIr/CoFeB/MgO heterostructures. To this end, harmonic Hall measurements and current induced domain wall motion experiments are performed. The motion of domain walls at zero applied field due to current demonstrates the presence of DMI in this system. We determine the strength of the DMI to be and deduce right-handed chirality in domain walls showing a partial Néel type spin structure. To ascertain the torques, we perform a second harmonic measurement to quantify the damping- and field-like current induced effective fields as a function of the magnetization direction. From the angular dependent analysis, we identify non-negligible higher order terms for polar magnetization angles , which need to be included when considering the effective manipulation of spins by current.
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30 March 2020
Research Article|
April 02 2020
Current induced chiral domain wall motion in CuIr/CoFeB/MgO thin films with strong higher order spin–orbit torques
Franziska Martin;
Franziska Martin
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
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Kyujoon Lee
;
Kyujoon Lee
a)
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
a)Author to whom correspondence should be addressed: [email protected]
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Alexander Kronenberg;
Alexander Kronenberg
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
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Samridh Jaiswal
;
Samridh Jaiswal
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
2
Singulus Technologies AG
, 63796 Kahl am Main, Germany
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Robert M. Reeve
;
Robert M. Reeve
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
3
Graduate School of Excellence Materials Science in Mainz
, 55128 Mainz, Germany
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Mariia Filianina
;
Mariia Filianina
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
3
Graduate School of Excellence Materials Science in Mainz
, 55128 Mainz, Germany
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Sanghyun Ji;
Sanghyun Ji
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
3
Graduate School of Excellence Materials Science in Mainz
, 55128 Mainz, Germany
4
Department of Physics, Sogang University
, Seoul 04107, South Korea
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Myung-Hwa Jung
;
Myung-Hwa Jung
4
Department of Physics, Sogang University
, Seoul 04107, South Korea
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Gerhard Jakob
;
Gerhard Jakob
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
3
Graduate School of Excellence Materials Science in Mainz
, 55128 Mainz, Germany
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Mathias Kläui
Mathias Kläui
1
Institute of Physics, Johannes Gutenberg University
, 55099 Mainz, Germany
3
Graduate School of Excellence Materials Science in Mainz
, 55128 Mainz, Germany
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a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 116, 132410 (2020)
Article history
Received:
December 03 2019
Accepted:
February 17 2020
Citation
Franziska Martin, Kyujoon Lee, Alexander Kronenberg, Samridh Jaiswal, Robert M. Reeve, Mariia Filianina, Sanghyun Ji, Myung-Hwa Jung, Gerhard Jakob, Mathias Kläui; Current induced chiral domain wall motion in CuIr/CoFeB/MgO thin films with strong higher order spin–orbit torques. Appl. Phys. Lett. 30 March 2020; 116 (13): 132410. https://doi.org/10.1063/1.5139704
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