scholarly journals Transverse and Longitudinal Spin-Torque Ferromagnetic Resonance for Improved Measurement of Spin-Orbit Torque

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
Saba Karimeddiny ◽  
Joseph A. Mittelstaedt ◽  
Robert A. Buhrman ◽  
Daniel C. Ralph
Keyword(s):  
Ferromagnetic Resonance ◽  
Spin Torque ◽  
Spin Orbit ◽  
Longitudinal Spin

scholarly journals Large spin-orbit torque efficiency enhanced by magnetic structure of collinear antiferromagnet IrMn

2019 ◽  
Vol 5 (5) ◽  
pp. eaau6696 ◽  
Author(s):  
Jing Zhou ◽  
Xiao Wang ◽  
Yaohua Liu ◽  
Jihang Yu ◽  
Huixia Fu ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Magnetic Structure ◽  
Ferromagnetic Resonance ◽  
Energy Efficient ◽  
Spin Torque ◽  
Memory Devices ◽  
Spin Orbit ◽  
Efficient Memory ◽  
Shed Light ◽  
Large Spin

Spin-orbit torque (SOT) offers promising approaches to developing energy-efficient memory devices by electric switching of magnetization. Compared to other SOT materials, metallic antiferromagnet (AFM) potentially allows the control of SOT through its magnetic structure. Here, combining the results from neutron diffraction and spin-torque ferromagnetic resonance experiments, we show that the magnetic structure of epitaxially grown L10-IrMn (a collinear AFM) is distinct from the widely presumed bulk one. It consists of twin domains, with the spin axes orienting toward [111] and [−111], respectively. This unconventional magnetic structure is responsible for much larger SOT efficiencies up to 0.60 ± 0.04, compared to 0.083 ± 0.002 for the polycrystalline IrMn. Furthermore, we reveal that this magnetic structure induces a large isotropic bulk contribution and a comparable anisotropic interfacial contribution to the SOT efficiency. Our findings shed light on the critical roles of bulk and interfacial antiferromagnetism to SOT generated by metallic AFM.

Spin-Pumping-Free Determination of Spin-Orbit Torque Efficiency from Spin-Torque Ferromagnetic Resonance

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Atsushi Okada ◽  
Yutaro Takeuchi ◽  
Kaito Furuya ◽  
Chaoliang Zhang ◽  
Hideo Sato ◽  
...  
Keyword(s):  
Ferromagnetic Resonance ◽  
Spin Torque ◽  
Spin Orbit ◽  
Spin Pumping

Separation of Artifacts from Spin‐Torque Ferromagnetic Resonance Measurements of Spin‐Orbit Torque for the Low‐Symmetry Van der Waals Semi‐Metal ZrTe 3

2021 ◽  
pp. 2100111
Author(s):  
Thow Min Cham ◽  
Saba Karimeddiny ◽  
Vishakha Gupta ◽  
Joseph A. Mittelstaedt ◽  
Daniel C. Ralph
Keyword(s):  
Ferromagnetic Resonance ◽  
Van Der Waals ◽  
Spin Torque ◽  
Spin Orbit ◽  
Low Symmetry

scholarly journals Spin–orbit-driven ferromagnetic resonance

2011 ◽  
Vol 6 (7) ◽  
pp. 413-417 ◽  
Author(s):  
D. Fang ◽  
H. Kurebayashi ◽  
J. Wunderlich ◽  
K. Výborný ◽  
L. P. Zârbo ◽  
...  
Keyword(s):  
Ferromagnetic Resonance ◽  
Spin Orbit

scholarly journals Current-induced spin–orbit torques

2011 ◽  
Vol 369 (1948) ◽  
pp. 3175-3197 ◽  
Author(s):  
Pietro Gambardella ◽  
Ioan Mihai Miron
Keyword(s):  
Angular Momentum ◽  
Exchange Coupling ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Torque ◽  
Inversion Symmetry ◽  
Spin Orbit ◽  
Great Flexibility ◽  
Combined Action ◽  
Proper Material

The ability to reverse the magnetization of nanomagnets by current injection has attracted increased attention ever since the spin-transfer torque mechanism was predicted in 1996. In this paper, we review the basic theoretical and experimental arguments supporting a novel current-induced spin torque mechanism taking place in ferromagnetic (FM) materials. This effect, hereafter named spin–orbit (SO) torque, is produced by the flow of an electric current in a crystalline structure lacking inversion symmetry, which transfers orbital angular momentum from the lattice to the spin system owing to the combined action of SO and exchange coupling. SO torques are found to be prominent in both FM metal and semiconducting systems, allowing for great flexibility in adjusting their orientation and magnitude by proper material engineering. Further directions of research in this field are briefly outlined.

scholarly journals Probing anisotropy in epitaxial Fe/Pt bilayers by spin–orbit torque ferromagnetic resonance

2021 ◽  
Vol 119 (21) ◽  
pp. 212407
Author(s):  
Mohammad Tomal Hossain ◽  
Sergi Lendinez ◽  
Laura Scheuer ◽  
Evangelos Th. Papaioannou ◽  
M. Benjamin Jungfleisch
Keyword(s):  
Ferromagnetic Resonance ◽  
Spin Orbit

scholarly journals Spin torque due to non-uniform Rashba spin orbit effect

AIP Advances ◽  
2012 ◽  
Vol 2 (4) ◽  
pp. 042133 ◽  
Author(s):  
Ji Chen ◽  
Mansoor Bin Abdul Jalil ◽  
Seng Ghee Tan
Keyword(s):  
Spin Torque ◽  
Spin Orbit ◽  
Rashba Spin
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