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Journal of the Korean Physical Society

, Volume 76, Issue 1, pp 93–96 | Cite as

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

  • Gi Wan Jeon
  • Kyu Won Lee
  • Cheol Eui LeeEmail author
Brief Reports

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.

Keywords

MoS2 High-energy proton irradiation Magnetism Structural defects 

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Notes

Acknowledgments

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.

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Copyright information

© The Korean Physical Society 2020

Authors and Affiliations

  1. 1.Department of PhysicsPukyong National UniversityBusanKorea
  2. 2.Department of PhysicsKorea UniversitySeoulKorea

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