Pulsed Hot Dense Oxygen Plasma Irradiation of Platinum for Improved Spin Hall Effect-Reference-Cited by-同舟云学术

Pulsed Hot Dense Oxygen Plasma Irradiation of Platinum for Improved Spin Hall Effect

Published:2023-11-24 Issue: Volume: Page:
ISSN:2010-3247
Container-title:SPIN
language:en
Short-container-title:SPIN

Author:

Kumar Sachin¹^ORCID,Manna Sourabh²^ORCID,Rex Mohan John³^ORCID,Shashank Utkarsh³^ORCID,Vas Joseph Vimal³⁴,Mishra Mayank²,Gupta Surbhi⁵^ORCID,Asada Hironori⁶,Fukuma Yasuhiro³⁷^ORCID,Rawat Rajdeep Singh²^ORCID,Medwal Rohit¹^ORCID

Affiliation:

1. Department of Physics, Indian Institute of Technology Kanpur, Kanpur 208016, India

2. Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, 637616, Singapore

3. Department of Physics and Information Technology, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, 680-4 Kawazu, Iizuka 820-8502, Japan

4. The Ernst Ruska-Centre for Microscopy and Spectroscopy, Forschungszentrum Jülich, 52428, Germany

5. Department of Physics, Motilal Nehru National Institute of Technology, Prayagraj, Uttar Pradesh, 211004, India

6. Department of Electronic Devices and Engineering, Graduate School of Science and Engineering, Yamaguchi University, Ube 755–8611, Japan

7. Research Center for Neuromorphic AI Hardware, Kyushu Institute of Technology, Kitakyushu 808-0196, Japan

Abstract

The impurity incorporation in host high spin-orbit coupling materials like platinum (Pt) has shown improved charge-to-spin conversion efficiency by modifying the up-spin and down-spin electrons trajectories via bending or skewing them in opposite directions. This enables efficient generation, manipulation, and transport of spin currents. In this study, we irradiated the Pt thin films with pulsed hot dense oxygen plasma in non-focus mode operation and analyzed the spin Hall angle of the oxygen plasma irradiated Pt films using spin torque ferromagnetic resonance (ST-FMR). Our results demonstrate a 2.4 times enhancement in the spin Hall angle after transient oxygen plasma treatment of Pt as compared to pristine Pt. This improvement might be because of the introduction of disorder and defects in the Pt lattice due to transient oxygen plasma processing, which enhanced the spin-orbit coupling and leads to more efficient charge-to-spin conversion without breaking the spin-orbit torque symmetries. Our findings offer a new method of dense plasma focus device-based modification of material for the development of advanced spintronic devices based on Pt and other heavy metals.

Funder

the Ministry of Education, Singapore, under its Academic Research Tier 1

National Research Foundation

JSPS Grant-in-Aid

Publisher

World Scientific Pub Co Pte Ltd

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

Link

https://www.worldscientific.com/doi/pdf/10.1142/S2010324723400246

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