High-Energy Proton-Irradiation Effects on the Magnetism of the Transition-Metal Dichalcogenide MoS2

Gi Wan Jeon; Kyu Won Lee; Cheol Eui Lee

doi:10.3938/jkps.76.93

High-Energy Proton-Irradiation Effects on the Magnetism of the Transition-Metal Dichalcogenide MoS₂

Gi Wan Jeon, Kyu Won Lee, Cheol Eui Lee

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We have studied the effects of high-energy proton irradiation on the magnetism of the transition-metal dichalcogenide MoS₂. The pristine sample showed ferromagnetic and paramagnetic responses with a diamagnetic background, which all decreased initially with increasing irradiation dose. The ferromagnetic component increased subsequently with further irradiation, for which a spin-3/2 species was identified from the analysis of the M(H) curve, in contrast to the spin-1 species identified in the pristine sample. The magnetism in our MoS₂ samples may be accounted for by the structural defects that apparently are cured by low-dose proton irradiation and subsequently become significant by further irradiation.

Original language	English
Pages (from-to)	93-96
Number of pages	4
Journal	Journal of the Korean Physical Society
Volume	76
Issue number	1
DOIs	https://doi.org/10.3938/jkps.76.93
Publication status	Published - 2020 Jan 1

Bibliographical note

Funding Information:
This work was supported by the Ministry of Education and the National Research Foundation of Korea (Project No. 2019S1A5A2A03050121). The Korea Basic Science Institute (KBSI) and the Korea Multi-Purpose Accelerator Complex (KOMAC) are, respectively, acknowledged for the measurements and the proton irradiation.

Publisher Copyright:
© 2020, The Korean Physical Society.

Keywords

High-energy proton irradiation
Magnetism
MoS
Structural defects

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.3938/jkps.76.93

Cite this

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title = "High-Energy Proton-Irradiation Effects on the Magnetism of the Transition-Metal Dichalcogenide MoS2 ",

abstract = "We have studied the effects of high-energy proton irradiation on the magnetism of the transition-metal dichalcogenide MoS2. The pristine sample showed ferromagnetic and paramagnetic responses with a diamagnetic background, which all decreased initially with increasing irradiation dose. The ferromagnetic component increased subsequently with further irradiation, for which a spin-3/2 species was identified from the analysis of the M(H) curve, in contrast to the spin-1 species identified in the pristine sample. The magnetism in our MoS2 samples may be accounted for by the structural defects that apparently are cured by low-dose proton irradiation and subsequently become significant by further irradiation.",

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