Large dam**-like spin–orbit torque and improved device performance utilizing mixed-phase Ta

A Kumar, R Sharma, KI Ali Khan… - ACS Applied …, 2021 - ACS Publications
The β phase of Ta is known to exhibit higher spin Hall efficiency compared to other heavy
metals such as Pt. However, the larger resistivity of β-phase Ta leads to higher power …

Optical damage limit of efficient spintronic THz emitters

S Kumar, A Nivedan, A Singh, Y Kumar, P Malhotra… - IScience, 2021 - cell.com
THz pulses are generated from femtosecond pulse-excited ferromagnetic/nonmagnetic
spintronic heterostructures via inverse spin Hall effect. The highest possible THz signal …

Large spin current generation by the spin Hall effect in mixed crystalline phase Ta thin films

A Kumar, R Bansal, S Chaudhary, PK Muduli - Physical Review B, 2018 - APS
Manipulation of the magnetization in heavy-metal/ferromagnetic bilayers via the spin-orbit
torque requires high spin Hall conductivity of the heavy metal. We measure inverse spin Hall …

Interfacial Origin of Unconventional Spin‐Orbit Torque in Py/γ− γ- IrMn3

A Kumar, P Gupta, N Chowdhury… - Advanced Quantum …, 2023 - Wiley Online Library
Angle‐resolved spin‐torque ferromagnetic resonance measurements are carried out in
heterostructures consisting of Py (Ni81Fe19) and a noncollinear antiferromagnetic quantum …

Large Spin Hall Angle in -W Thin Films Grown on CoFeB without Oxygen Plasma

R Bansal, G Nirala, A Kumar, S Chaudhary, PK Muduli - Spin, 2018 - World Scientific
We report on growth optimization and magnetodynamic properties of β-W/Co 2 0 Fe 6 0 B 2
0 system. We show that a relatively low growth rate of∼ 0. 1 7 Å/s is essential for the …

Asymmetric spin-orbit-torque-induced magnetization switching with a noncollinear in-plane assisting magnetic field

W Fan, J Zhao, M Tang, H Chen, H Yang, W Lü… - Physical Review …, 2019 - APS
The behaviors of spin-orbit-torque-(SOT) induced magnetization switching under an in-
plane assisting magnetic field with varied directions are investigated in heavy metal (Pt …

Evolution of spin Hall mechanism and spin–orbit torque in (α, β) phase tantalum film

N ** in few-layer MoS2/Py
R Bansal, A Kumar, N Chowdhury, N Sisodia… - Journal of Magnetism …, 2019 - Elsevier
We report on broadband ferromagnetic resonance spectroscopy studies of permalloy (Py)
thin films grown on large area pulse laser deposited MoS 2. We observe an enhancement of …

Spin-orbit torque-induced magnetization switching in epitaxial Au/Fe4N bilayer films

H Li, G Wang, D Li, P Hu, W Zhou, X Ma… - Applied Physics …, 2019 - pubs.aip.org
Au/Fe 4 N bilayer films have been grown by the plasma-assisted molecular beam epitaxy
system. After an extraordinarily small charge current is applied to the samples …