Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer

We report the investigation of the spin Hall angle (SHA) of Rhodium (Rh) and the effective magnetic damping constant of Ni80Fe20 in Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system using Spin Torque Ferromagnetic Resonance (STFMR) spectroscopy and density functional theory based analysis. The filtered DC...

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Main Authors: Mahato, Bipul Kr., Medwal, R., Baidya, S., Kumar, Durgesh, Piramanayagam, S. N., Rawat, R. S.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/167250
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1672502023-05-22T15:38:51Z Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer Mahato, Bipul Kr. Medwal, R. Baidya, S. Kumar, Durgesh Piramanayagam, S. N. Rawat, R. S. School of Physical and Mathematical Sciences National Institute of Education Division of Physics and Applied Physics Science::Physics::Atomic physics::Solid state physics Spin−Orbit Torque Spin Hall Conductivity We report the investigation of the spin Hall angle (SHA) of Rhodium (Rh) and the effective magnetic damping constant of Ni80Fe20 in Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system using Spin Torque Ferromagnetic Resonance (STFMR) spectroscopy and density functional theory based analysis. The filtered DC output voltages from Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system at different input signal frequencies and powers for a complete 360º angle were measured. The average magnetic damping constant of Ni80Fe20 is found to be 0.017 and the angle-dependent study shows a 2-fold symmetry with the in-plane anisotropy field of 120 Oe. The SHA of Rh is found to be 0.2 %. The results agrees well with the calculations based on density functional theory where we found spin Hall conductivity ( ) at the charge-neutral Fermi level (EF) is positive and it’s magnitude is ~423 (ℏ ) (S/cm). Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version We acknowledge the financial support from Ministry of Education (MOE), Singapore through grant number MOE2019-T2-1-058 and also the National Research Foundation (NRF), Singapore for grant NRF- CRP21-2018-0003. 2023-05-18T02:57:15Z 2023-05-18T02:57:15Z 2022 Journal Article Mahato, B. K., Medwal, R., Baidya, S., Kumar, D., Piramanayagam, S. N. & Rawat, R. S. (2022). Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer. Journal of Magnetism and Magnetic Materials, 555, 169404-. https://dx.doi.org/10.1016/j.jmmm.2022.169404 0304-8853 https://hdl.handle.net/10356/167250 10.1016/j.jmmm.2022.169404 555 169404 en NRF-CRP21-2018-0003 MOE2019-T2-1-058 Journal of Magnetism and Magnetic Materials © 2022 Elsevier B.V. All rights reserved. This paper was published Journal of Magnetism and Magnetic Materials and is made available with permission of Elsevier B.V. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics::Atomic physics::Solid state physics
Spin−Orbit Torque
Spin Hall Conductivity
spellingShingle Science::Physics::Atomic physics::Solid state physics
Spin−Orbit Torque
Spin Hall Conductivity
Mahato, Bipul Kr.
Medwal, R.
Baidya, S.
Kumar, Durgesh
Piramanayagam, S. N.
Rawat, R. S.
Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer
description We report the investigation of the spin Hall angle (SHA) of Rhodium (Rh) and the effective magnetic damping constant of Ni80Fe20 in Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system using Spin Torque Ferromagnetic Resonance (STFMR) spectroscopy and density functional theory based analysis. The filtered DC output voltages from Rh (10 nm)/Ni80Fe20 (10 nm) bilayer system at different input signal frequencies and powers for a complete 360º angle were measured. The average magnetic damping constant of Ni80Fe20 is found to be 0.017 and the angle-dependent study shows a 2-fold symmetry with the in-plane anisotropy field of 120 Oe. The SHA of Rh is found to be 0.2 %. The results agrees well with the calculations based on density functional theory where we found spin Hall conductivity ( ) at the charge-neutral Fermi level (EF) is positive and it’s magnitude is ~423 (ℏ ) (S/cm).
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Mahato, Bipul Kr.
Medwal, R.
Baidya, S.
Kumar, Durgesh
Piramanayagam, S. N.
Rawat, R. S.
format Article
author Mahato, Bipul Kr.
Medwal, R.
Baidya, S.
Kumar, Durgesh
Piramanayagam, S. N.
Rawat, R. S.
author_sort Mahato, Bipul Kr.
title Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer
title_short Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer
title_full Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer
title_fullStr Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer
title_full_unstemmed Spin Hall angle of rhodium and its effects on magnetic damping of Ni₈₀Fe₂₀ in Rh/Ni₈₀Fe₂₀ bilayer
title_sort spin hall angle of rhodium and its effects on magnetic damping of ni₈₀fe₂₀ in rh/ni₈₀fe₂₀ bilayer
publishDate 2023
url https://hdl.handle.net/10356/167250
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